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For the following​ claim, find the null and alternative​ hypotheses, test​ statistic, critical​ value, and draw...

For the following​ claim, find the null and alternative​ hypotheses, test​ statistic, critical​ value, and draw a conclusion. Assume that a simple random sample has been selected from a normally distributed population. Answer parts ​a-d.

​Claim: The mean IQ score of statistics professors is less than 125.

Sample​ data: n= 12​, x= 123​, s= 99. The significance level is a= 0.05.

Math   Statistics-And-Probability   
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