A manufacturer claims that the average lifetime of his lightbulb is 3 years or 36 months. The standard deviation is 7 months. Fifty bulbs are selected, and the average life expectancy is found to be 33 months. Should the manufacturer statement be rejected at level of significance 0.05.
A manufacturer claims that the average lifetime of his lightbulb is 3 years or 36 months. The standard deviation is 7 months. Fifty bulbs are selected, and the average life expectancy is found to be 33 months. Should the manufacturer statement be rejected at level of significance 0.05.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 14PPS
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- A manufacturer claims that the average lifetime of his lightbulb is 3 years or 36 months. The standard deviation is 7 months. Fifty bulbs are selected, and the average life expectancy is found to be 33 months. Should the manufacturer statement be rejected at level of significance 0.05.
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