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A local police force must pay for their uniforms at an average cost of $165 allowing...

A local police force must pay for their uniforms at an average cost of $165 allowing for cost variations for size, rank, etc. Switching to a new company reduced the average cost to $149 with a σn-1 = $68.15 based on a sample of n = 42 officers. Perform a hypothesis test with α = 5% to verify if uniform costs have significantly been reduced.

A. What is H0?

B. What is H1?

C. What is the value of the test statistic for this hypothesis test?

D. What is the value of the critical value for this hypothesis test?

E. What is the conclusion to this hypothesis test?

math   Statistics-And-Probability   
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