used car dealer says that the mean price of a three-year-old sports utility vehicle is $22,000. You suspect this claim is incorrect and find that a random sample of 22 similar vehicles has a mean price of $22,584 and a standard deviation of $1936. Is there enough evidence to reject the claim at α=0.05? Complete parts (a) through (e) below. Assume the population is normally distributed.
used car dealer says that the mean price of a three-year-old sports utility vehicle is $22,000. You suspect this claim is incorrect and find that a random sample of 22 similar vehicles has a mean price of $22,584 and a standard deviation of $1936. Is there enough evidence to reject the claim at α=0.05? Complete parts (a) through (e) below. Assume the population is normally distributed.
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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Question
A used car dealer says that the mean price of a three-year-old sports utility vehicle is
normally distributed.
$22,000.
You suspect this claim is incorrect and find that a random sample of
22
similar vehicles has a mean price of
$22,584
and a standard deviation of
$1936.
Is there enough evidence to reject the claim at
α=0.05?
Complete parts (a) through (e) below. Assume the population is Question content area bottom
Part 1
(a) Write the claim mathematically and identify
H0
and
Ha.
Which of the following correctly states
H0
and
Ha?
H0:
μ≠$22,000
Ha:
μ=$22,000
H0:
μ=$22,000
Ha:
μ>$22,000
H0:
μ=$22,000
Ha:
μ≠$22,000
H0:
μ>$22,000
Ha:
μ≤$22,000
H0:
μ≥$22,000
Ha:
μ<$22,000
H0:
μ=$22,000
Ha:
μ<$22,000
Part 2
(b) Find the critical value(s) and identify the rejection region(s).
What is(are) the critical value(s),
t0?
t0=enter your response here
(Use a comma to separate answers as needed. Round to three decimal places as needed.)
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