Reference no: EM132361841

Here's the scenario for the hypothesis test:

A major university claimed that the mean number of credit hours that their entire population of undergraduate students took each semester was 13.2. A counselor questioned whether this was true. She took a random sample of 250 undergraduate students, and the mean of that sample of students showed that they completed 12.6 credit hours. The population standard deviation is 1.6. Conduct a full hypothesis test using the p-value approach. Let α = .05. Determine if the mean credit hours for the sample is significantly different than that of the population.

List your "givens." This is the information that is given in the prompt. Try to use the symbols that will be in the formula.

Type what we are supposed to determine. Is it a mean? a proportion? a standard deviation?

Is this test one-tailed or two-tailed? How do you know? What boldface word gives it away in the scenario?

Now, go to this week's Notations and Symbols. What formula seems to match what we have been given and what we need to find?

Now, give the steps of hypothesis testing a try. Follow the p-value process, not the critical value process. P. 390-392 may be very helpful.

Last part: Let's say that you rejected the null hypothesis when you should not have. Is that a Type I or a Type II error?