Question 1: ________ measures the size of an effect in a population, whereas ______________ measures whether an effect exists in a population.

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Question 2: As effect size decreases, what happens to the power?

Question 3: What type of error is associated with decisions to reject the null hypothesis?

Question 4: A test statistic is associated with a p value less than .05. What is the decision for this hypothesis test?

Question 5 : What type of error do we directly control?

Question 6: Which type of test, one-tailed or two-tailed, is susceptible to the possibility of committing a Type III error?

Question 7: As effect size increases, what happens to the power?

Question 8: On average, what do we expect the sample mean to be equal to?

Question 9: What type of error is associated with decisions to retain the null hypothesis?

Question 10: The criterion or level of significance in behavioral research is typically set at what probability value?

Question 11: A researcher conducts a one-sample z test. The z statistic for the upper-tail critical test at a .05 level of significance is es016-1.jpg= 1.84. What is the decision for this test?

Question 12: For the following statements, write increases or decreases as an answer. The likelihood that we reject the null hypothesis (increases or decreases):

(a) The closer the value of a sample mean is to the value stated by the null hypothesis.

(b) The farther the value of a sample mean is from the value stated in the null hypothesis

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Question 13: A researcher selects a sample of 49 students to test the null hypothesis that the average student exercises 90 minutes per week. What is the mean for the

sampling distribution for this population of interest if the null hypothesis is true?

Question 14: State the four steps of hypothesis testing.

Step 1:

Step 2:

Step 3:

Step 4:

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Question 15: The effect size, power, and sample size of a study can affect the decisions we make in hypothesis testing.

1) True

2) False

Question 16: State the two correct decisions that a researcher can make.

Question 17: Is the following set of hypotheses appropriate for a

directional or a nondirectional hypothesis test?

Ho: U =35

H1:U =(= with a line through it) 35

Question 18: Researchers select a sample from a population to learn more about characteristics in that sample.

1) False

2) True

Question 19: If the null hypothesis is rejected, did we reach significance?

Question 20:The decision in hypothesis testing is to retain or reject which hypothesis: null or alternative?

Question 21: A researcher conducts a hypothesis test and finds that p = .0689. What is the decision for a hypothesis test at a .05 level of significance?

Question 22: The scores for a population are normally distributed with a mean equal to 25 and standard deviation equal to 6. A researcher selects a sample of 36 students and measures a sample mean equal to 23. For this example,

(a) What is the value of Cohen's d? (just enter the value include one place before the decimal and two after)

(b) Is this effect size small, medium, or large?

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Question 23:When a population is associated with a small effect size, what can a researcher do to increase the power of the study?