Cut up 90 small slips of paper, and write each number from 1 to 9 on 10 slips each. Put the slips in a large bowl and mix them up.

Part A - Take out a slip, write down the number on it, and put it back. Do this 20 times. Make a histogram (you can use StatCrunch in MyStatLab), and figure out the mean and the variance of the result.

Part B - Take 2 slips out, figure out their mean, write it down, and put the slips back. Repeat this process 20 times. Mae a histogram; then figure out the mean and the variance of this distribution of means.

Part C - Repeat the process again, this time taking out 3 slips at a time. Again, make a histogram and figure the mean and the variance of the distribution of means.