Consider the digits in the phone numbers on a randomly selected page of your local phone book a population. Make a frequency table of the final digit of 30 randomly selected phone numbers. For example, if a phone number is 555-9704, record a 4. a. Draw a histogram or other graph of this population Using the uniform compute the population mean and the population standard deviation. b. Also record the sample mean of the final four digits (9704 would lead to a mean of 5). Now draw a histogram or other graph showing the of the sample means. c. Compare the shapes of the two histograms.
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