问题描述：
请教一道统计题,没看懂什么意思,最好带题的意思的解释和答案讲解,谢谢.题在问题补充内.
A personality test has a subsection designed to assess the "honesty" of the test-taker. Suppose that you're interested in the mean score, μ, on this subsection among the general population. You decide that you'll use the mean of a random sample of scores on this subsection to estimate μ. What is the minimum sample size needed in order for you to be 95% confident that your estimate is within 3 of μ? Use the value 23 for the population standard deviation of scores on this subsection.
A personality test has a subsection designed to assess the "honesty" of the test-taker. Suppose that you're interested in the mean score, μ, on this subsection among the general population. You decide that you'll use the mean of a random sample of scores on this subsection to estimate μ. What is the minimum sample size needed in order for you to be 95% confident that your estimate is within 3 of μ? Use the value 23 for the population standard deviation of scores on this subsection.
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