Essay
A manufacturer wants to increase the shelf life of a line of cake mixes. Past records indicate that the average shelf life of the mix is 216 days. After a revised mix has been developed, a sample of nine boxes of cake mix had a mean of 217.222 days and a standard deviation of 1.2019 days. At the 0.025 significance level, what is the critical value?
Correct Answer:
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t = +2.306
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Correct Answer:
Verified
Explanation: For a test of a ...
View Answer
Unlock this answer now
Get Access to more Verified Answers free of charge
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