t P 0 NO Use the standard normal distribution or the t-distribution to construct a 90% confidence interval for the popul

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T P 0 No Use The Standard Normal Distribution Or The T Distribution To Construct A 90 Confidence Interval For The Popul 1 (34.34 KiB) Viewed 11 times

t P 0 NO Use the standard normal distribution or the t-distribution to construct a 90% confidence interval for the population mean. Justify your decision. If neither distribution can be used, explain why. Interpret the results. In a random sample of 18 mortgage institutions, the mean interest rate was 3.52% and the standard deviation was 0.41%. Assume the interest rates are normally distributed. Which distribution should be used to construct the confidence interval? A. Use a t-distribution because the interest rates are normally distributed and a is known. B. Use a normal distribution because n<30 and the interest rates are normally distributed. c. Use a t-distribution because it is a random sample, a is unknown, and the interest rates are normally distributed. OD. Use a normal distribution because the interest rates are normally distributed and a is known. OE. Cannot use the standard normal distribution or the t-distribution because a is unknown, n<30, and the interest rates are not normally distributed Select the correct choice below and, if necessary, fill in any answer boxes to complete your o A. The 90% confidence interval is (). (Round to two decimal places as needed.) B. Neither distribution can be used to construct the confidence interval.