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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 hrs a. Find the mean of the battery lives. (Type an integer or a decimal. Round to two decimal places.) b. Find the standard deviation of the battery lives. hrs (Type an integer or a decimal. Round to two decimal places.) Frequency 2 8 21 39 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 hrs a. Find the mean of the battery lives. (Type an integer or a decimal. Round to two decimal places.) b. Find the standard deviation of the battery lives. hrs (Type an integer or a decimal. Round to two decimal places.) Frequency 2 8 21 39 18 10 2

Algebra & Trigonometry with Analytic Geometry
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter5: Inverse, Exponential, And Logarithmic Functions
Section5.6: Exponential And Logarithmic Equations
Problem 69E
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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.) b. Find the standard deviation of the battery lives. hrs (Type an integer or a decimal. Round to two decimal places.) Frequency NONN 2 8 21 39 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.) b. Find the standard deviation of the battery lives. hrs (Type an integer or a decimal. Round to two decimal places.) Frequency NONN 2 8 21 39 18 10 2
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