Do you think that men or women, aged 1720, watch more

Chapter 13, Problem 1051

(choose chapter or problem)

Watching TV

Do you think that men or women, aged 17–20, watch more hours of TV weekly, or do you think that they watch the same number of hours?

a) Write a procedure to use to determine the answer to that question. In your procedure, use a sample of 30 men and 30 women. State how you will obtain an unbiased sample.

b) Collect 30 pieces of data from men aged 17–20 and 30 pieces of data from women aged 17–20. Round answers to the nearest 0.5 hr. Follow the procedure developed in part (a) to obtain your unbiased sample.

c) Compute the mean for your two groups of data to the nearest tenth.

d) Using the means obtained in part (c), answer the question asked at the beginning of the problem.

e) Is it possible that your conclusion in part (d) is wrong? Explain.

f ) Compute the standard deviation for each group to the nearest tenth. How do the standard deviations compare?

g) Do you believe that the distribution of data from either or both groups resembles a normal distribution? Explain.

h) Add the two groups of data to get one group of 60 pieces of data. If these 60 pieces of data are added and divided by 60, will you obtain the same mean as when you add the two means from part (c) and divide the sum by 2? Explain.

i) Compute the mean of the 60 pieces of data by using both methods mentioned in part (h). Are they the same? If so, why? If not, why not?

j) Do you believe that this group of 60 pieces of data represents a normal distribution? Explain.