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A market researcher investigated consumer preferences for Coca-Cola and Pepsi before a taste test and after...

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Statistics

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-ColaPepsi
Before Taste Test11090
After Taste Test11882


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?

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