4.1 In a grocery store, customers who pass by are asked to sample three cheese spreads and to declare their preference for one. Their frequencies of choice are as follow: Spread: A B C Frequency of choice: 20 39 25 Test the null hypothesis of equal preference using a as .05 and .01. What conclusions are allowable when 72 proves to be signicant. (8) 4.2 Applications of x2 in psychological research (2)