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Pearson Algebra 1 Common Core, 2011

PA

Pearson Algebra 1 Common Core, 2011 View details

3. Measures of Central Tendency and Dispersion

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Exercise 31 Page 744

It may be easier to calculate the mean, median, and mode if you rearrange the numbers first.

B

Practice makes perfect

Usually the first thing that should be done when finding the key features of a data set is rearranging the numbers from least to greatest. 9, 13, 16, 17, 20 The mean of a data set is calculated by finding the sum of all values in the set and then dividing by the number of values in the set. In this case, there are 5 values in the set.

Mean=Sum of values/Number of values

SubstituteValues

Substitute values

Mean=9 + 13 + 16 + 17 + 20/5

Add terms

Mean=75/5

Calculate quotient

Mean=15

This corresponds to answer B.

Subchapter links

Lesson Check p.742

Practice and Problem-Solving Exercises p.742-744

Standardized Test Prep p.744

Mixed Review p.744