# Description of Chi-square statistic

Why do you use the chi-square statistic? What type of data is used with chi square analysis?

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Solution:

The chi- square statistic is a nonparametric statistical technique used to determine if a distribution of observed frequencies differs from the theoretical expected frequencies.

Chi-square statistics use nominal or ordinal level data. It uses frequencies not the means and variances. No rigid assumption is necessary about type of population we are considering.

Value of the chi-square statistic can be found by using formula given below.

where fo is the observed frequency and fe is ...

#### Solution Summary

Solution explains the use of chi square statistic. It also explains the conditions for using it. Answer is typed in MS Word and it contains about 375 words.