The following data set represents a recent set of test scores in a Chemistry Class.

90, 90, 95, 100, 80, 80, 75, 80, 70, 60, 95, 100, 100, 100, 75, 80, 90, 90, 90, 70, 70, 80, 85, 90, 90, 85

Use astatistics calculator(Links to an external site.)to find the mean and standard deviation (round to nearest tenth) of the data set.

Mean: Sample Standard Deviation:

Sketch out the following diagram to help you solve the problem and label the mean and three standard deviations from the mean in both directions.