Stats Solutions

(See Solution) A local politician, running for reelection, claims that the mean prison time for car thieves is less than the required 5 years. A sample of 80

Question: A local politician, running for reelection, claims that the mean prison time for car thieves is less than the required 5 years. A sample of 80 convicted car thieves was randomly selected, and the sample mean length of prison time was found to be 4.5 years, with a sample standard deviation of 1.25 years. At = 0.10, test the politician’s claim. Decide whether the normal distribution or the t-distribution should be used.

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