deviation was 1.65 s. It has previously been assumed that the average adaptation time was at least 7 s. Assuming adaptation time to be normally distributed, does the data contradict prior belief? Using a hypothesis test with a-0.025,

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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In an experiment designed to measure the time necessary for an inspector's eyes to
become used to the reduced amount of light necessary for penetrant inspection, the
sample average time for n = 9 inspectors was 6.32 s and the sample standard
deviation was 1.65 s. It has previously been assumed that the average adaptation time
was at least 7 s. Assuming adaptation time to be normally distributed, does the data
contradict prior belief? Using a hypothesis test with a=0.025,
• What would be the critical value?
A. -2.262
B. -1.383
C. -1.397
D. -2.306
What would be the test statistic and conclusion?
A. -2.145; Reject Ho
B. -2.145; Fail to reject Ho
C. -1.236; Reject Ho
D. -1.236; Fail to reject Ho
Input answer as the LETTER ONLY.
Transcribed Image Text:In an experiment designed to measure the time necessary for an inspector's eyes to become used to the reduced amount of light necessary for penetrant inspection, the sample average time for n = 9 inspectors was 6.32 s and the sample standard deviation was 1.65 s. It has previously been assumed that the average adaptation time was at least 7 s. Assuming adaptation time to be normally distributed, does the data contradict prior belief? Using a hypothesis test with a=0.025, • What would be the critical value? A. -2.262 B. -1.383 C. -1.397 D. -2.306 What would be the test statistic and conclusion? A. -2.145; Reject Ho B. -2.145; Fail to reject Ho C. -1.236; Reject Ho D. -1.236; Fail to reject Ho Input answer as the LETTER ONLY.
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