What foods do aeronautical engineers like There were three t

What foods do aeronautical engineers like?

There were three types of food, and the researcher recorded which foods were bought.

Peanut Butter

Banana

Hamburger

15

7

4

(a) Use appropriate words and statistics to describe the statistical results. Based on this data which food seems to be preferred?

I used a chi-square goodness of fit test - not sure if that is correct?

X²(2, N = 26) = 7.46, p = .024

So is peanut butter the preffered food since the residual is 6.33? and the other two residuals are negative? or is there no statistical difference? and reject the null hypothesis?

this is the data calculated:

Chi-Square goodness-of-fit results:
Observed: var1
Expected: var2

thanks

Solution

Null hypothesis. H₀: aeronautical engineers like the three foods equally

Alternative hypothesis : H_A: aeronautical engineers like the three foods not equally

Goodness of Fit Test

observed

expected

O - E

(O - E)