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A sample of 100 dry battery cells tested to find the length of life produced the following results : X= 12 hours, o= 3 hours Assuming the data to be normally distributed, what percentage of battery cells are expected to have life : () More than 15 hours, (i) Less than 6 hours, and (iii) between 10 and 14 hours ? [Given z: 2.5 2 1 0.67 Area 0.4938 0.4772 0.3413 0.2487

A sample of 100 dry battery cells tested to find the length of life produced the following results : X= 12 hours, o= 3 hours Assuming the data to be normally distributed, what percentage of battery cells are expected to have life : () More than 15 hours, (i) Less than 6 hours, and (iii) between 10 and 14 hours ? [Given z: 2.5 2 1 0.67 Area 0.4938 0.4772 0.3413 0.2487

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 70E
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A sample of 100 dry battery cells tested to find the length of life produced the following results : X = 12 hours, o = 3 hours Assuming the data to be normally distributed, what percentage of battery cells are expected to have life : () More than 15 hours, (i) Less than 6 hours, and (iii) between 10 and 14 hours ? [Given z: 2.5 1 0.67 Area 0.4938 0.4772 0.3413 0.2487
Transcribed Image Text:A sample of 100 dry battery cells tested to find the length of life produced the following results : X = 12 hours, o = 3 hours Assuming the data to be normally distributed, what percentage of battery cells are expected to have life : () More than 15 hours, (i) Less than 6 hours, and (iii) between 10 and 14 hours ? [Given z: 2.5 1 0.67 Area 0.4938 0.4772 0.3413 0.2487
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