Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 11 Data Analysis and Statistics - 11.2 Apply Transformations to Data - 11.2 Exercises - Quiz for Lessons - Page 755: 7


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Work Step by Step

The mean, median, mode, range, and standard deviation of the data set when the outlier is included: $\bar x=\frac{120+130+150+180+230+280+320+320+350}{9}=231.1\\ Median =230\\Mode =320\\Range=350-120=230\\\sigma =84.39$ After promotion, the prices are equal to 80% of the initial price. New mean: $231.1 \times 0.8=184.8$ New median: $230 \times 0.8=184$ New mode: $320 \times 0.8=256$ New range: $230 \times 0.8=184$ New standard deviation: $84.39 \times 0.8=67.512$
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