Hướng dẫn std() function in python - hàm std () trong python

Mô -đun thống kê trong Python cung cấp một hàm được gọi là stdev (), có thể được sử dụng để tính độ lệch chuẩn. Chức năng stdev () chỉ tính toán độ lệch chuẩn từ một mẫu dữ liệu, thay vì toàn bộ dân số. & NBSP;stdev() , which can be used to calculate the standard deviation. stdev() function only calculates standard deviation from a sample of data, rather than an entire population. stdev() , which can be used to calculate the standard deviation. stdev() function only calculates standard deviation from a sample of data, rather than an entire population. 

Nội dung chính

• Công thức độ lệch chuẩn trong Python là gì?
• Làm thế nào để họ tính toán STD?
• Làm thế nào để bạn tìm thấy độ lệch chuẩn mẫu trong Python?
• STD trong Numpy trong Python là gì?

Để tính độ lệch chuẩn của toàn bộ dân số, một hàm khác được gọi là pstdev () được sử dụng. & Nbsp;pstdev() is used. pstdev() is used. 

Độ lệch chuẩn là một thước đo của sự lây lan trong thống kê. Nó được sử dụng để định lượng thước đo của sự lan truyền, biến thể của một tập hợp các giá trị dữ liệu. Nó rất giống với phương sai, đưa ra thước đo độ lệch trong khi phương sai cung cấp giá trị bình phương. Bộ được trải ra ngoài giá trị trung bình trung bình của chúng. Một thuộc tính hữu ích của độ lệch chuẩn là, không giống như phương sai, nó được biểu thị bằng cùng một đơn vị với dữ liệu. & NBSP; is a measure of spread in Statistics. It is used to quantify the measure of spread, variation of a set of data values. It is very much similar to variance, gives the measure of deviation whereas variance provides the squared value. A low measure of Standard Deviation indicates that the data are less spread out, whereas a high value of Standard Deviation shows that the data in a set are spread apart from their mean average values. A useful property of the standard deviation is that, unlike the variance, it is expressed in the same units as the data.  is a measure of spread in Statistics. It is used to quantify the measure of spread, variation of a set of data values. It is very much similar to variance, gives the measure of deviation whereas variance provides the squared value. 
A low measure of Standard Deviation indicates that the data are less spread out, whereas a high value of Standard Deviation shows that the data in a set are spread apart from their mean average values. A useful property of the standard deviation is that, unlike the variance, it is expressed in the same units as the data. 

Standard Deviation is calculated by :


where x1, x2, x3.....xn are observed values in sample data,
 is the mean value of observations and
N is the number of sample observations.

Cú pháp: Stdev ([Data-Set], Xbar) tham số: & nbsp; [Data]: Một số có thể có số có giá trị thực. Độ lệch của các giá trị được truyền dưới dạng tham số. Exexceptions: & nbsp; StatisticerError được nâng lên cho dữ liệu-set nhỏ hơn 2 giá trị được truyền dưới dạng tham số. -Set. & nbsp; & nbsp;stdev( [data-set], xbar )Parameters : [data] : An iterable with real valued numbers. xbar (Optional): Takes actual mean of data-set as value.Returnype : Returns the actual standard deviation of the values passed as parameter.Exceptions : StatisticsError is raised for data-set less than 2 values passed as parameter. Impossible/precision-less values when the value provided as xbar doesn’t match actual mean of the data-set.   stdev( [data-set], xbar )
Parameters : 
[data] : An iterable with real valued numbers. 
xbar (Optional): Takes actual mean of data-set as value.
Returnype : Returns the actual standard deviation of the values passed as parameter.
Exceptions : 
StatisticsError is raised for data-set less than 2 values passed as parameter. 
Impossible/precision-less values when the value provided as xbar doesn’t match actual mean of the data-set. 
 

Mã số 1: & nbsp; & nbsp;    

Python3

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

Đầu ra: & nbsp;   

Standard Deviation of the sample is 1.5811388300841898 

Mã số 2: Trình diễn stdev () trên một tập hợp các loại dữ liệu khác nhau & nbsp; & nbsp; Demonstrate stdev() on a varying set of data types   Demonstrate stdev() on a varying set of data types  

Python3

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Các

Các

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

Standard Deviation of the sample is 1.5811388300841898 

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

Standard Deviation of the sample is 1.5811388300841898 

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

Standard Deviation of the sample is 1.5811388300841898 

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

Standard Deviation of the sample is 1.5811388300841898 

Đầu ra: & nbsp;  

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

Mã số 2: Trình diễn stdev () trên một tập hợp các loại dữ liệu khác nhau & nbsp; & nbsp;Demonstrate the difference between results of variance() and stdev()  Demonstrate the difference between results of variance() and stdev()  

Python3

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

Đầu ra: & nbsp;  

Standard Deviation of the sample is 1.5811388300841898 

Mã số 2: Trình diễn stdev () trên một tập hợp các loại dữ liệu khác nhau & nbsp; & nbsp;Demonstrate the difference between results of variance() and stdev()   Demonstrate the use of xbar parameter  

Python3

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

Đầu ra: & nbsp; 

Mã số 2: Trình diễn stdev () trên một tập hợp các loại dữ liệu khác nhau & nbsp; & nbsp; Demonstrate stdev() on a varying set of data types  

Đầu ra: & nbsp;  

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

Mã số 2: Trình diễn stdev () trên một tập hợp các loại dữ liệu khác nhau & nbsp; & nbsp;Demonstrate the difference between results of variance() and stdev()   Demonstrates StatisticsError  

Python3

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

Standard Deviation of the sample is 1.5811388300841898 

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

Standard Deviation of the sample is 1.5811388300841898 

Đầu ra: & nbsp;   

The Standard Deviation of Sample1 is 3.9761191895520196
The Standard Deviation of Sample2 is 1.8708286933869707
The Standard Deviation of Sample3 is 7.8182478855559445
The Standard Deviation of Sample4 is 0.41967844833872525

Mã số 2: Trình diễn stdev () trên một tập hợp các loại dữ liệu khác nhau & nbsp; & nbsp;    

• The Standard Deviation of Sample1 is 3.9761191895520196
  The Standard Deviation of Sample2 is 1.8708286933869707
  The Standard Deviation of Sample3 is 7.8182478855559445
  The Standard Deviation of Sample4 is 0.41967844833872525

  7

  The Standard Deviation of Sample1 is 3.9761191895520196
  The Standard Deviation of Sample2 is 1.8708286933869707
  The Standard Deviation of Sample3 is 7.8182478855559445
  The Standard Deviation of Sample4 is 0.41967844833872525

  8

  Standard Deviation of the sample is 1.5811388300841898 

  00

  Standard Deviation of the sample is 1.5811388300841898 

  60

• The Standard Deviation of Sample1 is 3.9761191895520196
  The Standard Deviation of Sample2 is 1.8708286933869707
  The Standard Deviation of Sample3 is 7.8182478855559445
  The Standard Deviation of Sample4 is 0.41967844833872525

  7

  Standard Deviation of the sample is 1.5811388300841898 

  62

  Standard Deviation of the sample is 1.5811388300841898 

  00

  Standard Deviation of the sample is 1.5811388300841898 

  64

Công thức độ lệch chuẩn trong Python là gì?

Phương pháp stdev () tính toán độ lệch chuẩn từ một mẫu dữ liệu. Độ lệch chuẩn là một thước đo cách trải rộng các con số. Một độ lệch chuẩn lớn chỉ ra rằng dữ liệu được trải ra, - một độ lệch chuẩn nhỏ cho thấy rằng dữ liệu được phân cụm chặt chẽ xung quanh giá trị trung bình. calculates the standard deviation from a sample of data. Standard deviation is a measure of how spread out the numbers are. A large standard deviation indicates that the data is spread out, - a small standard deviation indicates that the data is clustered closely around the mean. calculates the standard deviation from a sample of data. Standard deviation is a measure of how spread out the numbers are. A large standard deviation indicates that the data is spread out, - a small standard deviation indicates that the data is clustered closely around the mean.

Làm thế nào để họ tính toán STD?

Các bước để tính toán độ lệch chuẩn...

Bước 1: Tìm giá trị trung bình.....

Bước 2: Tìm độ lệch của mỗi điểm so với giá trị trung bình.....

Bước 3: Hình vuông mỗi độ lệch so với giá trị trung bình.....

Bước 4: Tìm tổng hình vuông.....

Bước 5: Tìm phương sai.....

Bước 6: Tìm căn bậc hai của phương sai ..

Làm thế nào để bạn tìm thấy độ lệch chuẩn mẫu trong Python?

Mô -đun thống kê trong Python cung cấp một hàm được gọi là stdev (), có thể được sử dụng để tính độ lệch chuẩn.Chức năng stdev () chỉ tính toán độ lệch chuẩn từ một mẫu dữ liệu, thay vì toàn bộ dân số.stdev() , which can be used to calculate the standard deviation. stdev() function only calculates standard deviation from a sample of data, rather than an entire population.stdev() , which can be used to calculate the standard deviation. stdev() function only calculates standard deviation from a sample of data, rather than an entire population.

STD trong Numpy trong Python là gì?

std () trong Python.Numpy.STD (ARR, trục = Không): Tính độ lệch chuẩn của dữ liệu đã cho (các phần tử mảng) dọc theo trục được chỉ định (nếu có) .. Độ lệch chuẩn (SD) được đo bằng phân phối phân phối dữ liệu trong tập dữ liệu đã cho.Compute the standard deviation of the given data (array elements) along the specified axis(if any).. Standard Deviation (SD) is measured as the spread of data distribution in the given data set.Compute the standard deviation of the given data (array elements) along the specified axis(if any).. Standard Deviation (SD) is measured as the spread of data distribution in the given data set.