Question: this is the question 13. Suppose a sample yields a 95% confidence interval for / of (20, 30). Do you expect a wider, narrower, or

this is the question

13. Suppose a sample yields a 95% confidence interval for / of (20, 30). Do you expect a wider, narrower, or similar confidence interval in the following situations? (a) A 99% confidence interval is constructed; (b) the sample size is much larger; (c) the sample mean is much larger; (d) the standard deviation is much larger

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