The average cost of groceries for a US household in 2019 was $387 per month. An economist claims that the average cost for groceries is now higher due to inflation and supply chain issues. A random sample of 32 households had a mean of $412 with a standard deviation of $45. At the x= 0.05 significance level, is there evidence to support the economists claim? a. Write the null and alternative hypothesis b. Find the test statistic (2 decimal places) c. Find the p-value (4 decimal places) d. Decision: reject or fail to reject? Why? e. Conclusion in context of the problem Calculator Command

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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1. The average cost of groceries for a US household in 2019 was $387 per month. An economist claims that the
average cost for groceries is now higher due to inflation and supply chain issues. A random sample of 32
households had a mean of $412 with a standard deviation of $45. At the x= 0.05 significance level, is there
evidence to support the economists claim?
a. Write the null and alternative hypothesis
b. Find the test statistic (2 decimal places)
c. Find the p-value (4 decimal places)
d. Decision: reject or fail to reject? Why?
e. Conclusion in context of the problem
Calculator Command
Transcribed Image Text:1. The average cost of groceries for a US household in 2019 was $387 per month. An economist claims that the average cost for groceries is now higher due to inflation and supply chain issues. A random sample of 32 households had a mean of $412 with a standard deviation of $45. At the x= 0.05 significance level, is there evidence to support the economists claim? a. Write the null and alternative hypothesis b. Find the test statistic (2 decimal places) c. Find the p-value (4 decimal places) d. Decision: reject or fail to reject? Why? e. Conclusion in context of the problem Calculator Command
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