The area of study is Sampling Methods and the Central Limit Theorem.
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.
Draw a histogram or other graph of this population distribution. Using the uniform distribution, compute the population mean and the population standard deviation.