# Question

The mean and the standard deviation of the sample of 65 customer satisfaction ratings in Table are 42.95 and 2.6424, respectively. Calculate a t-based 95 percent confidence interval for μ, the mean of all possible customer satisfaction ratings for the XYZ- Box video game system. Are we 95 percent confident that μ is at least 42, the minimal rating given by a very satisfied customer?

## Answer to relevant Questions

The mean and the standard deviation of the sample of 100 bank customer waiting times in Table are 5.46 and 2.475, respectively. Calculate a t-based 95 percent confidence interval for μ, the mean of all possible bank ...Referring to Exercise 8.11a, assume that the population standard deviation equals 33. How large a random sample of public owner-controlled companies is needed to make us? In exercise Suppose that a random sample of 100 ...Suppose we are using the sample size formula in the box on page 313 to find the sample size needed to make the margin of error in a confidence interval for p equal to E. In each of the following situations, explain what ...The manufacturer of the ColorSmart-5000 television set claims 95 percent of its sets last at least five years without needing a single repair. In order to test this claim, a consumer group randomly selects 400 consumers who ...In an article in Accounting and Business Research, Beattie and Jones investigate the use and abuse of graphic presentations in the annual reports of United Kingdom firms. The authors found that 65 percent of the sampled ...Post your question

0