Use the standard normal distribution or the t-distribution to construct a 99% 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 49 people, the mean body mass index (BMI) was 29.9 and the standard deviation was 6.03. Which distribution should be used to construct the confidence interval? Choose the correct answer below. O A. Use a t-distribution because the sample is random, n2 30, and o is unknown. O B. Use a t-distribution because the sample is random, the population is normal, and o is unknown. O C. Use a normal distribution because the sample is random, the population is normal, and o is known. O D. Use a normal distribution because the sample is random, n2 30, and o is known. OE. Neither a normal distribution nor a t-distribution can be used because either the sample is not random, or n<30, and the population is not known to be normal,
Use the standard normal distribution or the t-distribution to construct a 99% 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 49 people, the mean body mass index (BMI) was 29.9 and the standard deviation was 6.03. Which distribution should be used to construct the confidence interval? Choose the correct answer below. O A. Use a t-distribution because the sample is random, n2 30, and o is unknown. O B. Use a t-distribution because the sample is random, the population is normal, and o is unknown. O C. Use a normal distribution because the sample is random, the population is normal, and o is known. O D. Use a normal distribution because the sample is random, n2 30, and o is known. OE. Neither a normal distribution nor a t-distribution can be used because either the sample is not random, or n<30, and the population is not known to be normal,
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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