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Random and independent samples of 65 recent prime time airings from each of two major networks have been considered. The first network aired a mean of 108.8 commercials during prime time, with a standard deviation of 5.2 commercials. The second network aired a mean of 111.2 commercials, with a standard deviation of 5.1 commercials. As the sample sizes are quite large, the population standard deviations can be estimated using the sample standard deviations. Construct a 99% confidence interval for μ1 - μ2, the difference between the mean number of commercials μ1 aired during prime time by the first network and the mean number of commercials μ2 aired during prime time by the second network. Then complete the table below
Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places. (If necessary, consult a list of formulas.)
What is the lower limit of the 99% confidence interval?
What is the upper limit of the 99% confidence interval?
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Caselet on McDonald’s vs. Burger King - Waiting time
Generate descriptive statistics. Create a stem-and-leaf plot of the data and box plot of the data.
Problems on Sampling Variability and Standard Error and Confidence Intervals
Estimate the population mean
Conduct a marketing experiment in which students are to taste one of two different brands of soft drink
Find out the probability
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