# Statistics

## Chi-square test of goodness of fit with examples

Chi-square test of goodness of fit Chi-square test of goodness of fit is a non-parametric test. One of the principle...

## Chi-square test of independence with examples

Chi-square test of Independence Assumptions The two variables should be measured at an ordinal or nominal level. Each variable should...

## Sample size calculator to estimate proportion

Sample size required to estimate proportion The formula to estimate the sample size required to estimate the proportion is ...

## Sample size calculator to test hypothesis about mean

Sample size to test hypothesis about mean In inferential statistics, knowing how many samples to take from the population is...

## Sample size calculator to estimate mean

Sample size to estimate mean In inferential statistics, knowing how many samples to take from the population is extremely important....

## Moment coefficient of kurtosis calculator for grouped data

Moment coefficient of kurtosis for grouped data Let $(x_i,f_i), i=1,2, \cdots , n$ be given frequency distribution. The mean of...