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A company manufactures light bulbs. The company wants the bulbs to have a mean life span of 1007 hours. This average is maintained by periodically testing random samples of 25 light bulbs. If the t-value falls between -to 9g and to 99, then the company will be satisfied that it is manufacturing acceptable light bulbs. For a random sample, the mean life span of the sample is 1020 hours and the standard deviation is 28 hours. Assume that life spans are approximately normally distributed. Is the company making acceptable light bulbs? Explain. The company making acceptable light bulbs because the t-value for the sample is t= and to 99 = is (Round to two decimal places as needed.)

A company manufactures light bulbs. The company wants the bulbs to have a mean life span of 1007 hours. This average is maintained by periodically testing random samples of 25 light bulbs. If the t-value falls between -to 9g and to 99, then the company will be satisfied that it is manufacturing acceptable light bulbs. For a random sample, the mean life span of the sample is 1020 hours and the standard deviation is 28 hours. Assume that life spans are approximately normally distributed. Is the company making acceptable light bulbs? Explain. The company making acceptable light bulbs because the t-value for the sample is t= and to 99 = is (Round to two decimal places as needed.)

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
Section10.4: Distributions Of Data
Problem 3GP
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15 of 15 (15 complete) Question Help v A company manufactures light bulbs. The company wants the bulbs to have a mean life span of 1007 hours. This average is maintained by periodically testing random samples of 25 light bulbs. If the t-value falls between -to 9g and to 99, then the company will be satisfied that it is manufacturing acceptable light bulbs. For a random sample, the mean life span of the sample is 1020 hours and the standard deviation is 28 hours. Assume that life spans are approximately normally distributed. Is the company making acceptable light bulbs? Explain. The company making acceptable light bulbs because the t-value for the sample is t = and to 99 = is (Round to two decimal places as needed.)
Transcribed Image Text:15 of 15 (15 complete) Question Help v A company manufactures light bulbs. The company wants the bulbs to have a mean life span of 1007 hours. This average is maintained by periodically testing random samples of 25 light bulbs. If the t-value falls between -to 9g and to 99, then the company will be satisfied that it is manufacturing acceptable light bulbs. For a random sample, the mean life span of the sample is 1020 hours and the standard deviation is 28 hours. Assume that life spans are approximately normally distributed. Is the company making acceptable light bulbs? Explain. The company making acceptable light bulbs because the t-value for the sample is t = and to 99 = is (Round to two decimal places as needed.)
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