Complete the mcq:
1. Which of the following accurately describes the critical region?
outcomes with a high probability if the null hypothesis is true
outcomes with very low probability if the null hypothesis is true
outcomes with a high probability whether or not the null hypothesis is true
outcomes with a very low probability whether or not the null hypothesis is true
2. With o= .05, how are the boundaries for the critical region determined?
boundaries are drawn so there is 5% (0.5) in the center of the distribution
boundaries are drawn so there is 5 % (.05) in each tail 2.5% because of each tail?
boundaries are drawn so there is 2.5% (.025) in each tail
boundaries are drawn so there is 10% (.10) in each tail of the distribution
3. If a hypothesis test produces a z score in the critical region, what decision should me made?
fail to reject the null hypothesis
fail to reject the alternative hypothesis
reject the alternative hypothesis
reject the null hypothesis
4. A sample of n= 25 individuals is selected from a population with u=80 and a treatment is administered to the sample. what is expected if the treatment has no effect?
the sample mean should be very different from 80 and should lead you to fail to reject the null hypothesis
the sample mean should be close to 80 and should lead you to fail to reject the null hypothesis
the sample mean should be very different from 80 and should lead you to reject the null hypothesis
the sample mean should be close to 80 and should lead you to reject the null hypothesis
5. Which of the following is an accurate definition of a type 1 error?
rejecting a false null hypothesis
rejecting a true null hypothesis
failing to reject a false null hypothesis
failing to reject a true null hypothesis
6. Which of the following is an accurate definition of a type II error?
rejecting a true null hypothesis
rejecting a false null hypothesis
failing to reject a true null hypothesis
failing to reject a false null hypothesis