Question: 14. Suppose we know that = 10 but we do not know . We would like to specify the interval that with 95% confidence contains

14. Suppose we know that = 10 but we do not know . We would like to specify the interval that with 95% confidence contains . The data are Xi: 10, 30, 20, 25. Determine this confidence interval. 17. Suppose we do not know and the data are the same as in Exercise 14. Determine the 95% confidence interval. 18. Is the confidence interval in Exercise 17 narrower or wider than the one in Exercise 14? Explain why

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