Sampling Experiments

How Many Marbles?

Work Time

How Many Marbles?

You will take samples from the jar as specified below. The Marble Jar interactive will create samples that represents the glass jar of marbles from the Opening. Between each sample, all marbles will be replaced in the jar before the next sample is selected.

Do the following:

  • For each group of five samples of different sizes, find the mean number of marbles for each color.
  • Determine the number of marbles for each color in the jar, based on the mean you calculated for each color.


  1. Draw 5 samples of 10 marbles each.
  2. Draw 5 samples of 50 marbles each.
  3. Draw 5 samples of 100 marbles each.


  • Remember, the mean is the average of the data set.