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Ignacio is curious about the average age of cars in the commuter lot at his large university. He takes a random- sample of 16 cars and finds that their average age is a = 14.5 years and their standard deviation is s = 4.6 years. The distribution of ages in the sample was roughly symmetric with no obvious outliers. Based on this sample, which of the following is a 90% confidence interval for the mean age of cars (in years) in this commuter lot?

Ignacio is curious about the average age of cars in the commuter lot at his large university. He takes a random- sample of 16 cars and finds that their average age is a = 14.5 years and their standard deviation is s = 4.6 years. The distribution of ages in the sample was roughly symmetric with no obvious outliers. Based on this sample, which of the following is a 90% confidence interval for the mean age of cars (in years) in this commuter lot?

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Ignacio is curious about the average age of cars in the commuter lot at his large university. He takes a random- sample of 16 cars and finds that their average age is x 14.5 years and their standard deviation is s. :4.6 years. The distribution of ages in the sample was roughly symmetric with no obvious outliers. Based on this sample, which of the following is a 90% confidence interval for the mean age of cars (in years) in this commuter lot?
Transcribed Image Text:Ignacio is curious about the average age of cars in the commuter lot at his large university. He takes a random- sample of 16 cars and finds that their average age is x 14.5 years and their standard deviation is s. :4.6 years. The distribution of ages in the sample was roughly symmetric with no obvious outliers. Based on this sample, which of the following is a 90% confidence interval for the mean age of cars (in years) in this commuter lot?
A (6.44, 22.56) B (12.05, 16.95) C (12.48, 16.52) (12.61, 16.39) (13.35, 15.65)
Transcribed Image Text:A (6.44, 22.56) B (12.05, 16.95) C (12.48, 16.52) (12.61, 16.39) (13.35, 15.65)
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