. The population mean debt at graduation is less than $18,000. Test the hypotheses using 99% confidence level and summarize your conclusion. b. Find the confidence interval within 98% confidence level.

. The population mean debt at graduation is less than $18,000. Test the hypotheses using 99% confidence level and summarize your conclusion. b. Find the confidence interval within 98% confidence level.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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Question

A random sample of the average debt (in dollars) at graduation from 30 of the top 100
public colleges and universities is listed below. Assume σ = $2605.
16,012 15,784 16,597 18,105 12,665 14,734
14,835 14,437 17,225 16,953 15,309 15,297
13,607 13,374 19,410 18,385 22,312 16,656
20,142 17,821 12,701 22,400 15,730 17,673
18,978 13,661 12,580 14,392 16,000 15,176
a. The population mean debt at graduation is less than $18,000. Test the hypotheses
using 99% confidence level and summarize your conclusion.
b. Find the confidence interval within 98% confidence level.

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