The quality-control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether the mean life of a large shipment of CFLs is equal to 7520 hours. The population standard deviation is 980 hours. A random sample of 49 light bulbs indicates a sample mean life of 7,310 hours. a. At the 0.05 level of significance, is there evidence that the mean life is different from 7520 hours? a. Let μ be the population mean. Determine the null hypothesis, H0, and the alternative hypothesis, H1. H0: μ ▼ greater than or equals≥ not equals≠ equals= less than or equals≤ enter your response here H1: μ ▼ less than< not equals≠ equals= greater than> enter your response here
The quality-control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether the mean life of a large shipment of CFLs is equal to 7520 hours. The population standard deviation is 980 hours. A random sample of 49 light bulbs indicates a sample mean life of 7,310 hours. a. At the 0.05 level of significance, is there evidence that the mean life is different from 7520 hours? a. Let μ be the population mean. Determine the null hypothesis, H0, and the alternative hypothesis, H1. H0: μ ▼ greater than or equals≥ not equals≠ equals= less than or equals≤ enter your response here H1: μ ▼ less than< not equals≠ equals= greater than> enter your response here
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 13PPS
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Question
The quality-control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether the mean life of a large shipment of CFLs is equal to
7520
hours. The population standard deviation is
980 hours.
A random sample of
49
light bulbs indicates a sample mean life of
7,310
hours.a. At the
0.05
level of significance, is there evidence that the mean life is different from 7520 hours?a. Let
μ
be the population mean. Determine the null hypothesis,
H0,
and the alternative hypothesis,
H1.
H0:
μ
enter your response here
▼
greater than or equals≥
not equals≠
equals=
less than or equals≤
H1:
μ
enter your response here
▼
less than<
not equals≠
equals=
greater than>
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