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Technology and the Internet A recent study suggests that there is a relationship between Twitter…

Technology and the Internet A recent study suggests that there is a relationship between Twitter use and TV ratings.26 A random sample of prime-time television shows was obtained. During the month of September, the Twitter volume (x, in millions) of tweets on the day of each show and the Nielsen TV rating ( y) was recorded for each show. The summary statistics are

Technology and the Internet A recent study suggests that there is a relationship between Twitter...

a. Find an estimate of the true mean TV rating if there are 400 million tweets on the day of the show.

b. Suppose the number of tweets during a day is 450 million. Is there any evidence that the true mean TV rating will exceed 2.3? Use a significance level of 0.05.

c. Construct a 99% confidence interval for the true mean TV rating when x = 375. On the basis of this interval, do you think the mean TV rating is less than 2.3? Justify your answer.