A maintenance department manager wants to prove that the average monthly cost (in SR 1000's) for repairs is less than 11

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A maintenance department manager wants to prove that the average monthly cost (in SR 1000's) for repairs is less than 11

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A Maintenance Department Manager Wants To Prove That The Average Monthly Cost In Sr 1000 S For Repairs Is Less Than 11 1
A Maintenance Department Manager Wants To Prove That The Average Monthly Cost In Sr 1000 S For Repairs Is Less Than 11 1 (17.32 KiB) Viewed 23 times
A maintenance department manager wants to prove that the average monthly cost (in SR 1000's) for repairs is less than 11.565. A sample of 46 weekly repairs gave a mean of 11.25 and a standard deviation of 1.113. To test the claim, at 2.5% significance level, 1. Find the test statistics (round your answer up to 4 decimal places). 2. What is the critical value of the test? 3. What is your decision regarding HO, reject or don't reject HO?
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