Test Hypotheses about a Population Mean with Known Using the Classical Approach
-A local judge claims that the mean prison time for car thieves is less than the required 4 years. A sample of 80 convicted car thieves was randomly selected, and the mean length of prison time was found to be 3 years and 6 months, with a standard deviation of 1 year and 3 months. At $\alpha = 0.05$, test the judge's claim.

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The Answer of Test Hypotheses about a Population Mean with Known Using the Classical Approach
-A local judge claims that the mean prison time for car thieves is less than the required 4 years. A sample of 80 convicted car thieves was randomly selected, and the mean length of prison time was found to be 3 years and 6 months, with a standard deviation of 1 year and 3 months. At $\alpha = 0.05$, test the judge's claim.

Test Hypotheses About a Population Mean with Known Using the Classical