A cola-tasting experiment is conducted in which 100 people are each given a half-cup of Cola A and a half-cup of Cola B. All 100 participants taste both colas and then rate the taste of each cola on a 0 (horrible) to 50 (tastes great) scale. For each person, a coin is tossed to determine the order of tasting the two colas. To estimate the mean difference between ratings of the two products, what procedure should be used?
a. A confidence interval for one proportion.
b. A confidence interval for a difference between two proportions.
c. A paired t (or 1-sample t) confidence interval for a mean difference.
d. A 2-sample t confidence interval for a difference in two means.
Question 2
Data is to be gathered to estimate the proportion of residents who will vote for Mr. Treehouse in the coming city elections. A random sample of 650 voters is interviewed and 306 of them say that they will support Mr. Treehouse. What is the sample proportion of residents who will vote for Mr. Treehouse in the coming city elections?
Hershey and Chase experiment showing that the genetic material of T2 phage is DNA
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Summary of Avery, MacLeod, and McCarty’s experiment