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2. Over at NAIA, you are observing the average length of flight delays (excluding flights that leave on time). Your notes for ten randomly chosen days are here: Ave. delay (hrs:min) 0:43 0:13 0:17 Day Ave. delay (hrs:min) Day 2:00 1:48 0:19 8 4 0:25 0:34 5 2:18 10 3:12 If the airport claims that the delays will be no more than a minute on average, check his claim by doing the following: (a) Write the null hypothesis. (b) Write the alternative hypothesis. (c) Formulate and calculate the test-statistic. Is it a one-tail or two-tailed test? Did the airport told you the truth at 95% confidence level? (d) Determine the confidence interval.

2. Over at NAIA, you are observing the average length of flight delays (excluding flights that leave on time). Your notes for ten randomly chosen days are here: Ave. delay (hrs:min) 0:43 0:13 0:17 Day Ave. delay (hrs:min) Day 2:00 1:48 0:19 8 4 0:25 0:34 5 2:18 10 3:12 If the airport claims that the delays will be no more than a minute on average, check his claim by doing the following: (a) Write the null hypothesis. (b) Write the alternative hypothesis. (c) Formulate and calculate the test-statistic. Is it a one-tail or two-tailed test? Did the airport told you the truth at 95% confidence level? (d) Determine the confidence interval.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.1: Measures Of Center
Problem 14PPS
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2. Over at NAIA, you are observing the average length of flight delays (excluding flights that leave on time). Your notes for ten randomly chosen days are here: Ave. delay (hrs:min) 0:43 0:13 0:17 Day Ave. delay (hrs:min) Day 2:00 1:48 0:19 8 4 0:25 0:34 5 2:18 10 3:12 If the airport claims that the delays will be no more than a minute on average, check his claim by doing the following: (a) Write the null hypothesis. (b) Write the alternative hypothesis. (c) Formulate and calculate the test-statistic. Is it a one-tail or two-tailed test? Did the airport told you the truth at 95% confidence level? (d) Determine the confidence interval.
Transcribed Image Text:2. Over at NAIA, you are observing the average length of flight delays (excluding flights that leave on time). Your notes for ten randomly chosen days are here: Ave. delay (hrs:min) 0:43 0:13 0:17 Day Ave. delay (hrs:min) Day 2:00 1:48 0:19 8 4 0:25 0:34 5 2:18 10 3:12 If the airport claims that the delays will be no more than a minute on average, check his claim by doing the following: (a) Write the null hypothesis. (b) Write the alternative hypothesis. (c) Formulate and calculate the test-statistic. Is it a one-tail or two-tailed test? Did the airport told you the truth at 95% confidence level? (d) Determine the confidence interval.
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