Confidence interval-average ages for the viewers

Assignment Help Basic Statistics

Reference no: EM1395858

Advertisers examine the average age of viewers of TV programs. For example, 60 Minutes reportedly has one of the highest average ages at 57. Suppose that a marketing analyst believes that the age gap between 60 Minutes and Star Trek: Voyager has narrowed to less than the historical 15 years. A random sample of 100 viewers from each of the TV programs was selected and the results are as follows:

60 Minutes: Sample Mean = 55.6 Population standard deviation = 10.8, Sample size = 100. Star Trek: Voyager: Sample Mean = 41.8, Population standard deviation = 7.9, Sample size = 100.

A. Construct a 99% confidence interval on the difference of the average ages for the viewers of the two TV programs. How can you interpret this interval?

B. Test the hypothesis that the difference in the average age of viewers for these two programs is less than 15 years. Use a significance level of 1%.

C. Why can you not use the confidence interval in part A to test the hypothesis in part B?

Reference no: EM1395858

Questions Cloud

What will be the effect on the linking number : Consider a circular, B form DNA molecule with a superhelical density of -0.05. Suppose that during replication initiation, a stretch of 84 base pairs unwinds (untwists) without breaking the phosphodiester backbone.

Finding expected proportions of baldness : A man, whose father had hair but mother was both bald, has children with a woman with ahir whose mother was bald

What is the evidence supporting each of these possibilities : What are the two major hypotheses for the evolutionary history of introns in prokaryotes and eukaryotes? What is the evidence supporting each of these possibilities? What kind of additional evidence, if available, could help resolve this debate.

How to learn technical writing skills : You may lose your possibility at getting a grant. Write down some things that you can do to learn technical writing skills?

Confidence interval-average ages for the viewers : Construct a 99% confidence interval on the difference of the average ages for the viewers of the two TV programs. How can you interpret this interval?

Describe the two types of rna editing : Describe the two types of RNA editing, outlining the different steps involved. Which type of editing involves the most significant changes in the mRNA sequence?

Compare the spliceosome to the ribosome : Compare the spliceosome to the ribosome. What general features do they share in terms of their structure, their components, and their activity? How do they differ?

Mean number of production units for two shifts : Find a 90% confidence interval on the difference in the mean number of production units for the two shifts.

Difference between intermediate host and definitive host : What is the difference between an intermediate host and a definitive host? Identify each host in the life cycle of the causative agent of malaria?

User Account

All Pages