Lesson 6: Communicate About Data


Complete a graph for the following list of grades on a recent test.
75, 65, 88, 92, 45, 47, 59, 74, 48, 96, 75, 56, 67, 69, 76


Answer the following questions:

a)  How many scores are displayed?

b)  What was the lowest score?

c)  What was the highest score?

d)  What is the mean score?

e)  What is the median score?

f)  What is the mode score?

g)  If you removed the highest and lowest values, how would the mean, median and mode change?

h)  What measure (mean, median or mode) gives you the best way to find out how the class is doing?  Explain using the communication checklist.

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