Question: Dr. Freund, a noted psychologist, is interested in determining whether mentally retarded children, given four choices of colors, prefer one over the other three. Dr. Freund conjectures that color preference may have some effect on behavior. Eighty mentally retarded children are given a choice of a brown, orange, yellow or green T-shirt. This is a tally of their selections:

Color Number

Brown 25

Orange 18

Yellow 19

Green 18

Total 80

Conduct a Chi-square (Goodness-of -fit) test, utilizing a ten percent significance level.