An insurance company is informed that its mean cost for handling a claim is $58. This is more than the industry average, so cost-cutting measures were started that aimed at reducing costs. The insurance company carried out a study six months later to see if their efforts had been successful. They used a sample of 26 claims that had a sample mean of $55 and a sample standard deviation of $10. Use the .01 level of significance. Apply the Neyman Pearson CV test and the p-value a test of Fisher to this problem.
Added by Melissa W.
Step 1
The null hypothesis (H₀) is that the mean cost for handling a claim is still $58, and the alternative hypothesis (H₁) is that the mean cost has decreased. H₀: μ = 58 H₁: μ < 58 Show more…
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