Calculate the average lifetime ( usage in hours) of Brand X battery and Brand Y battery

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter2: Systems Of Linear Equations
Section2.4: Applications
Problem 1EQ: 1. Suppose that, in Example 2.27, 400 units of food A, 600 units of B, and 600 units of C are placed...
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Calculate the average lifetime ( usage in hours) of Brand X battery and Brand Y battery

A consumers'organization is planning a study of the various brands of batteries that are
available. As part of its planning, it measures lifetime (how long a battery can be used
before it must be replaced) for each of 9 batteries of Brand X and 8 batteries of Brand Y.
The battery lives for each brand are shown in the given table.
Brand
72 hrs
74
70
75
76
73
75
76
75
Brand
Y
73 hrs
70
73
74
76
77
75
74
Transcribed Image Text:A consumers'organization is planning a study of the various brands of batteries that are available. As part of its planning, it measures lifetime (how long a battery can be used before it must be replaced) for each of 9 batteries of Brand X and 8 batteries of Brand Y. The battery lives for each brand are shown in the given table. Brand 72 hrs 74 70 75 76 73 75 76 75 Brand Y 73 hrs 70 73 74 76 77 75 74
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