Contents

# Covariance

Calculates the covariance of two sets of numeric data.

​​ដើម្បី​ប្រើ​​បញ្ជា​នេះ...

#### From the menu bar:

Choose Data - Statistics - Covariance

#### From the tabbed interface:

Choose Data - Statistics - Covariance.

On the Data menu of the Data tab, choose Statistics - Covariance.

The covariance is a measure of how much two random variables change together.

For more information on statistical covariance, refer to the corresponding Wikipedia article.

### ទិន្នន័យ

Input Range: The reference of the range of the data to analyze.

Results to: The reference of the top left cell of the range where the results will be displayed.

#### Grouped By

Select whether the input data has columns or rows layout.

#### ឧទាហរណ៍

The following data will be used as example

| A | B | C
1 | Maths | Physics | Biology
--- | --- | --- | ---
2 | 47 | 67 | 33
3 | 36 | 68 | 42
4 | 40 | 65 | 44
5 | 39 | 64 | 60
6 |  | 38 | 43
7 | 47 | 84 | 62
8 | 29 | 80 | 51
9 | 27 | 49 | 40
10 | 57 | 49 | 12
11 | 56 | 33 | 60
12 | 57 |  |
13 | 26 |  |

The following table displays the results of the covariance of the sample data above.

Covariances | Column 1 | Column 2 | Column 3
--- | --- | --- | ---
Column 1 | 111.65 |  |
Column 2 | -61.4444444444 | 258.41 |
Column 3 | -32 | 53.11 | 204.61

ប្រធានបទ​ទាក់ទង

Sampling

Descriptive Statistics

Analysis of Variance (ANOVA)

Correlation

Covariance

Exponential Smoothing

Moving Average

Regression Analysis

Paired t-test

F-test

Z-test

Chi-square test

Fourier Analysis