23.    A consumer group claims that the mean minimum time it takes for a sedan to travel a quarter mile is greater than 14.8 seconds. A random sample of 21 sedans has a mean minimum time to travel a quarter mile of 15.3 seconds and a standard deviation of 2.09 seconds. At α=0.01 is there enough evidence to support the consumer​ group's claim? Complete parts​ (a) through​ (d) below. Assume the population is normally distributed.       ​(a) Identify the claim and state H0 and Ha.   H0:  ▼   muμ pp sigmaσ sigma squaredσ2 ▼   not equals≠ greater than> less than< less than or equals≤ equals= greater than or equals≥ enter your response here Ha:  ▼   sigmaσ muμ sigma squaredσ2 pp ▼   greater than> equals= greater than or equals≥ not equals≠ less than< less than or equals≤ enter your response here ​(Type integers or decimals. Do not​ round.)   The claim is the ▼   null alternative hypothesis.

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23. 

 

A consumer group claims that the mean minimum time it takes for a sedan to travel a quarter mile is greater than
14.8
seconds. A random sample of
21
sedans has a mean minimum time to travel a quarter mile of
15.3
seconds and a standard deviation of
2.09
seconds. At
α=0.01
is there enough evidence to support the consumer​ group's claim? Complete parts​ (a) through​ (d) below. Assume the population is normally distributed.
 
 
 
​(a) Identify the claim and state
H0
and
Ha.
 
H0: 
 
muμ
pp
sigmaσ
sigma squaredσ2
 
not equals≠
greater than>
less than<
less than or equals≤
equals=
greater than or equals≥
enter your response here
Ha: 
 
sigmaσ
muμ
sigma squaredσ2
pp
 
greater than>
equals=
greater than or equals≥
not equals≠
less than<
less than or equals≤
enter your response here
​(Type integers or decimals. Do not​ round.)
 
The claim is the
 
null
alternative
hypothesis.
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