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17. [1/10.5 Points] DETAILS PREVIOUS ANSWERS ASWSBE14 8.TB.2.045. MY NOTES PRACTICE ANOTHER qu You are given the following information obtained from a random sample of 6 observations. Assume the population has a normal distribution. 1521241921 20 (a) What is the point estimate of u? 20 (b) Construct an 80% confidence interval for u. (Round your answers to three decimal places.) k7']8.3678 7 to L21,631 (c) Construct a 98% confidence interval for . (Round your answers to three decimal places.) (16.280 to[ 23719 (d) Discuss why the 80% and 98% confidence intervals are different. (O As the sample size increases and all else stays the same, the confidence interval becomes wider. (O As the confidence level increases and all else stays the same, the confidence interval becomes narrower. As the confidence level increases and all else stays the same, the confidence interval becomes wider. (O As the sample size increases and all else stays the same, the confidence interval becomes narrower. (O Changing the confidence level or sample size while all else stays the same shifts the confidence interval left or right. Viewing Saved Work Revert to Last Response Submit