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

Question 1

The degree of risk you are willing to take that you will reject the null hypothesis when it is actually true is known as a:

A) Significance level
B) Type III error
C) Type II error
D) Power

Answer 1

A

Question 2

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

A) Type I error
B) Correct decision
C) Type II error
D) Power

Answer 2

A

Question 3

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

A) Reject the null hypothesis
B) Accept the null hypothesis
C) Set a higher p value
D) Increase your sample

Answer 3

A

Question 4

An error that cannot be controlled is called a?

A) Type I error
B) Chance
C) Type II error
D) Probability

Question 5

What Greek letter is associated with Type I error?

Question 6

If you want to examine the difference between the average scores of two unrelated groups, which of the following statistical techniques should you select?

A) Regression
B) t test for dependent samples
C) Analysis of variance
D) t test for independent samples

Question 7

When reporting statistical significance, how is this usually represented?

A) p = .05
B) p > .05
C) p < .05
D) p = .01

Question 8

What does 1 - ? represent?

A) Alpha level
B) Type I error
C) Type II error
D) Power

Question 9

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

A) Probability
B) Meaningfulness
C) Significance
D) Statistics

Question 10

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

A) Critical value
B) Significance level
C) Obtained value
D) p value

Question 11

What is the test statistic that is calculated by the statistical procedure known as?

A) Critical value
B) Significance level
C) Obtained value
D) p value

Question 12

Which of the following is a statement of equality?

A) Research hypothesis
B) Directional hypothesis
C) Nondirectional hypothesis
D) Null hypothesis

Question 13

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

A) Type I error
B) Incorrect decision
C) Type II error
D) Power

Question 14

What Greek letter is associated with Type II error?

Question 15

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

A) Type I error
B) Correct decision
C) Type II error
D) Power

Question 16

The level of chance you are willing to take is called the?

A) Beta level
B) Power level
C) Significance level
D) Chance level

Question 17

If you want to examine the difference between the average scores of three unrelated groups, which of the following statistical techniques should you select?

A) Regression
B) t test for dependent samples
C) Analysis of variance
D) t test for independent samples

Question 18

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

A) Regression
B) t test for dependent samples
C) Analysis of variance
D) t test for independent samples

Question 19

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

A) Reject the null hypothesis
B) Accept the null hypothesis
C) Reduce the p value
D) Decrease your sample

Question 20

Which of the following occurs when you accept the null hypothesis when it is really false?

A) Type I error
B) Correct decision
C) Type II error
D) Power

Question 21

If you conclude that your findings yield a 1-in-100 chance that differences were not due to the hypothesized reason, what is the corresponding p value?

Question 22

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

Question 23

What is the difference between the obtained value and the critical value?

Question 24

List the steps to take when applying a statistical test to the null hypothesis.

Question 25

If you conclude that your findings yield a 1-in-20 chance that differences were not due to the hypothesized reason, what is the corresponding p value?

Question 26

Under the normal curve, if the obtained value falls to the left of the critical value, under what percent of the normal curve did it fall?

Question 27

What is the definition for significance level?

Question 28

What is the formula for calculating power?

Question 29

What are the Greek letters associated with Type I and Type II error?

Question 30

Complete the following table: