Exam 9: Significantly Significant: What It Means for You and Me

Some statistical tests allow you to make a conclusion that there is a real effect with 100% certainty.

If you want to examine the difference between the average scores for students on a pretest/posttest measure, which statistical technique should you select?

Under the normal curve, if the obtained value falls to the right of the critical value, what percentage of the normal curve does it fall under?

Why do we use inferential statistics?

When we say p < .05, it suggests that there is less than 5 chance in ______ that any differences found were not due to the hypothesized reason.

Which of the following occurs when you reject the null hypothesis when it is really true?

If a researcher sets the decision rule p value at .05, what is the probability of making a Type I error?

If the obtained value is less than the critical value, what should you do?

What is the error that cannot be controlled called?

Define power (with regard to hypothesis testing).

When we test differences between the mean scores of more than two unconnected groups, which of the following statistical techniques should we select?

Define significance level.

Which of the following is the term associated with identifying differences between groups that are not due to chance?

In order to determine whether or not you will reject the null hypothesis, the test statistic value must be compared against the _______.

A(n) _______ difference is due to some systematic influence and not due to chance.

What is the definition of the degree of risk you are willing to take that you will reject a null hypothesis when it is actually true?

When we test differences between the mean scores of two unconnected groups, which of the following statistical techniques should we select?

After you provide a statement of the null hypothesis, you ______.