A researcher is interested consumer preferences among three brands of smartphones. A sample of 90 people is obtained, and each individual is asked to indicate his/her favorite brand. The resulting frequency data are as follows:
Brand A- 37
Brand B- 21
Brand C- 32
Do the data indicate any significant preferences among the three brands of smartphones? Test at the .05 level of significance.
-null and alternative hypotheses
-compute Chi2 statistic
-find in the B.7 table & write down a critical value of Chi2 that you've used for the decision about H0
-the conclusion