Recently, due to increase in technological innovation, the production manager Encik Harris wants to increase the quality of the chili sauce that they produced. Past records indicate that the average shelf life of the sauce is 216 days. After a revised recipe has been developed, a sample of nine (9) bottles of chili sauce has been selected which yield a mean of 217.22 and a standard deviation of 1.2019. Required: At the 0.025 significance level, decide if the sample data support the claim that shelf life has increased. State your decision in terms of the null hypothesis. Draw an appropriate diagram to support your claim.

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Recently, due to increase in
technological innovation, the production manager Encik Harris wants to increase
the quality of the chili sauce that they produced. Past records indicate that the
average shelf life of the sauce is 216 days. After a revised recipe has been
developed, a sample of nine (9) bottles of chili sauce has been selected which
yield a mean of 217.22 and a standard deviation of 1.2019.
Required:
At the 0.025 significance level, decide if the sample data support the claim that
shelf life has increased. State your decision in terms of the null hypothesis. Draw
an appropriate diagram to support your claim.
Transcribed Image Text:Recently, due to increase in technological innovation, the production manager Encik Harris wants to increase the quality of the chili sauce that they produced. Past records indicate that the average shelf life of the sauce is 216 days. After a revised recipe has been developed, a sample of nine (9) bottles of chili sauce has been selected which yield a mean of 217.22 and a standard deviation of 1.2019. Required: At the 0.025 significance level, decide if the sample data support the claim that shelf life has increased. State your decision in terms of the null hypothesis. Draw an appropriate diagram to support your claim.
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