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Suppose you wish to determine if the mean IQ of students on a certain campus is...

Suppose you wish to determine if the mean IQ of students on a certain campus is different from the mean IQ in the general​ population, 100. To conduct this​ study, you obtain a simple random sample of 80 students on this​ campus, administer an IQ​ test, and record the results. The mean IQ of the sample of 80 students is found to be 108.5 with a standard deviation of 12.9. Complete parts​ (a) through​ (c) below.

Determine the critical​ value(s) for H0​: μ = μ0 versus H1​: μ ≠ μ0

hypothesis test with sample size 80 and α=0.05 level of significance. Select the correct choice below and fill in the answer​ box(es) within your choice.

​(Round to three decimal places as​ needed.)

A.The critical values are ±

B.The critical value is

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