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Name: A report states that the average age of commercial airliners in the Un
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Description: A report states that the average age of commercial airliners in the United States is 11 years with a standard deviation of 2.7 years. A researcher wants to test this claim and finds that a random sample of 40 planes from around the United States is 1

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A report states that the average age of commercial airliners in the United States is 11 years with a standard deviation of 2.7 years. A researcher wants to test this claim and finds that a random sample of 40 planes from around the United States is 11.9 years. He believes that the average age of airliners has increased.

He would like to be able to detect if the average age is 11 or more years at

? = 0.05.

Identify the rejection region. (Round your answer to three decimal places.)

At ? = 0.05, an ---Select---( lower-tail, upper-tail) test would reject H₀if z ?( ≥ ,≤) = ______

A report states that the average age of commercial airliners in the United States is 11 years with a standard deviation of 2.7 years. A researcher wants to test this claim and finds that a random sample of 40 planes from around the United States is 11.9 years. He
believes that the average age of airliners has increased.
He would like to be able to detect if the average age is 11 or more years at a = 0.05.
In USE SALT
(a) What are the appropriate null and alternative hypotheses?
Ho: H = 11
H: µ < 11
Ho: H = 11
H: µ > 11
Но: и 3 11
H3: µ # 11
Ho:H< 11
Ha: u > 11
(b) Identify the rejection region. (Round your answer to three decimal places.)
At a = 0.05, an
-Select--- v test would reject H, if z ? v

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