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A manufacturing firm claims that the batteries used in their electronic games will last an average of 30 hours. To maintain this average, 16 batteries are tested each month. If the compared t-value falls between -t0.025 and t0.025, the firm is satisfied with its claim. What conclusion should the firm draw from a sample that has a mean of x = 27.5 hours and a standard deviation of s = 5 hours? Assume the distribution of battery lives to be approximately normal.

A manufacturing firm claims that the batteries used in their electronic games will last an average of 30 hours. To maintain this average, 16 batteries are tested each month. If the compared t-value falls between -t0.025 and t0.025, the firm is satisfied with its claim. What conclusion should the firm draw from a sample that has a mean of x = 27.5 hours and a standard deviation of s = 5 hours? Assume the distribution of battery lives to be approximately normal.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section: Chapter Questions
Problem 22SGR
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A manufacturing firm claims that the batteries used in their electronic games will last an average of 30 hours. To maintain this average, 16 batteries are tested each month. If the compared t-value falls between -t0.025 and t0.025, the firm is satisfied with its claim. What conclusion should the firm draw from a sample that has a mean of x 27.5 hours and a standard deviation of s = 5 hours? Assume the distribution of battery lives to be approximately normal.
Transcribed Image Text:A manufacturing firm claims that the batteries used in their electronic games will last an average of 30 hours. To maintain this average, 16 batteries are tested each month. If the compared t-value falls between -t0.025 and t0.025, the firm is satisfied with its claim. What conclusion should the firm draw from a sample that has a mean of x 27.5 hours and a standard deviation of s = 5 hours? Assume the distribution of battery lives to be approximately normal.
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