Using the frequencies procedure (ANALYZE, DESCRIPTIVE STATISTICS, FREQUENCIES), request a histogram of television viewing data from the General Social Survey (TV HOURS) with the normal curve overlay (from the Charts button), as well as the mean and standard deviation (from the Statistics button).
a. Comment on the closeness of the actual distribution to the normal curve.
b. Based on the normal distribution (using the z score and Table A), what is the probability that a person watches three or more hours of television per day?
c. Compare the probability from the normal distribution to the actual proportion of reports of three or more hours of television viewing per day.