## Algebra 1

Published by Prentice Hall

# Chapter 12 - Data Analysis and Probability - Chapter Review - 12-3 Measures of Contral Tendency and Dispersion - Page 776: 12

#### Answer

The mean is 26.33 the median is 26 The modes are 23,25 and 29. The range is 9.

#### Work Step by Step

The mean is the average of the data so add all the values and divide by 15:$\frac{23+31+26+27+25+28+23+23+25+29+29+29+25+22+30}{15}$=26.33 Arrange the values from least to greatest(23,31,26,27,25,28,23,23,25,29,29,29,25,22,30) and find the middle value.The median is 26. The mode is the number that occurs most often. 23,25 and 29 occur the most so they are the modes. The range is the difference between the largest and the smallest value: 31-22=9. The range is 9.

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