[Solved] A random sample of 8 observations was drawn from a normal population. The sample mean and sample standard deviation are X̄ = 40 and s = 10. Estimate
Question: A random sample of 8 observations was drawn from a normal population. The sample mean and sample standard deviation are \(\bar{X}\) = 40 and s = 10.
- Estimate the population mean with 95% confidence.
- Repeat part a assuming that you know that the population standard deviation is σ = 10.
- Explain why the interval estimate produced in Part b is narrower than that in Part a
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