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Suppose that the population of SAT scores is normally distributed with a mean of 1000 and...

Suppose that the population of SAT scores is normally distributed with a mean of 1000 and a standard deviation of 100. To determine the effect of a course to prepare for the SAT, a random sample of 25 students who have taken the course is selected. The sample mean SAT is 1050. Do these data provide sufficient evidence at the 1% significance level to infer that students who take the course perform better on the SAT on average? Assume that the population standard deviation of scores did not change.

A. No, the p-value is greater than .01

B. Yes, the p-value is greater than .01

C. Yes, the p-value is less than .01

D. None of the above

math   Statistics-And-Probability   
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