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The lives (in hours of continuous use) of 100 randomly selected flashlight batteries are: Interval 6.95-7.45 7.45-7.95 7.95-8.45 8.45-8.95 8.95-9.45 9.45-9.95 9.95-10.45 a. Find the mean of the battery lives. hrs (Type an integer or a decimal. Round to two decimal places.) hrs b. Find the standard deviation of the battery lives. (Type an integer or a decimal. Round to two decimal places.) Frequency 2 8 19 41 18 10 2

The lives (in hours of continuous use) of 100 randomly selected flashlight batteries are: Interval 6.95-7.45 7.45-7.95 7.95-8.45 8.45-8.95 8.95-9.45 9.45-9.95 9.95-10.45 a. Find the mean of the battery lives. hrs (Type an integer or a decimal. Round to two decimal places.) hrs b. Find the standard deviation of the battery lives. (Type an integer or a decimal. Round to two decimal places.) Frequency 2 8 19 41 18 10 2

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter7: Percents
Section: Chapter Questions
Problem 2PTTS
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The lives (in hours of continuous use) of 100 randomly selected flashlight batteries are: Interval 6.95-7.45 7.45-7.95 7.95-8.45 8.45 - 8.95 8.95-9.45 9.45-9.95 9.95-10.45 a. Find the mean of the battery lives. hrs (Type an integer or a decimal. Round to two decimal places.) hrs b. Find the standard deviation of the battery lives. (Type an integer or a decimal. Round to two decimal places.) Frequency 2 8 19 41 18 10 2
Transcribed Image Text:The lives (in hours of continuous use) of 100 randomly selected flashlight batteries are: Interval 6.95-7.45 7.45-7.95 7.95-8.45 8.45 - 8.95 8.95-9.45 9.45-9.95 9.95-10.45 a. Find the mean of the battery lives. hrs (Type an integer or a decimal. Round to two decimal places.) hrs b. Find the standard deviation of the battery lives. (Type an integer or a decimal. Round to two decimal places.) Frequency 2 8 19 41 18 10 2
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