A market researcher investigated consumer preferences forCoca-Cola and Pepsi before a taste test and after a taste test. Thefollowing table summarizes the results from a sample of 200consumers:
| SOFT DRINK: | |
|---|
| PREFERENCE: | Coca-Cola | Pepsi |
|---|
| Before Taste Test | 110 | 90 |
|---|
| After Taste Test | 118 | 82 |
|---|
She wanted to perform a chi-square test to see if there is evidenceof a difference in preference for Coca-Cola before and after thetaste test by allowing a 10% probability of incorrectly concludingthat there is a difference when there is in fact no difference.
a) The test will involve _________ degree(s) of freedom.
b) The critical value of the test is _________.
c) The value of the test statistic is _________.
d) Give the above results, should the null hypothesis will berejected?
