# Chi square test for Goodness of Fit

Suppose we wanted to look at the frequencies at which children present with certain psycho-pathologies. We obtain the following data on 50 children at a treatment facility:

Depressive Disorders ADHD Anxiety Psychotic Disorders Eating Disorders

14 8 15 5 8

a. What is the null hypothesis?

b. What are the expected frequencies?

c. What is the df?

d. Calculate x2

e. Discuss your findings.

See the attached file.

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#### Solution Summary

The solution provides step-by-step method for the calculation of chi square test for goodness of fit. Formula for the calculation and Interpretations of the results are also included. Interactive excel sheet is included. The user can edit the inputs and obtain the complete results for a new set of data.

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