A consumer group claims that the mean minimum time it takes for a sedan to travel a quarter mile is greater than 14.5 seconds. A random sample of 23 sedans has a mean minimum time to travel a quarter...


A consumer group claims that the mean minimum time it takes for a sedan to travel a quarter mile is greater than 14.5 seconds. A random sample of 23 sedans has a mean minimum time to travel a quarter mile of 15.5 seconds and a standard deviation of 2.11 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.


The claim is  the _____ hypothesis


(b) use technology to find the P value. Find the standardized test statistic, t.


t=______


Obtain the P value


P=_______


(c)Decide whether to reject or fail to reject the null hypothesis:


(d) Interpret the decision in the context of the original claim:



Jun 08, 2022
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