Question 1

If the value of the test statistic is in the rejection region,then

Accepted Answer

A) p < .05 
B) the decision is to reject the null hypothesis 
C) the value of the test statistic is larger than the critical value 
D) all of the above 
A) p < .05 
B) the decision is to reject the null hypothesis 
C) the value of the test statistic is larger than the critical value 
D) all of the above D

Question 2

A Type III error is only possible for hypothesis tests where the rejection region is located in one tail.

Accepted Answer

A) True 
 B)False  True

Question 3

The alpha level must be split into each tail for a directional hypothesis test.

Accepted Answer

A) True 
 B)False  False

Question 4

The probability of committing a Type I error is stated by ________;the probability for committing a Type II error is stated by ________.

Accepted Answer

A) beta;alpha 
B) alpha;beta 
C) a p value;a p value 
D) the power;the power 
A) beta;alpha 
B) alpha;beta 
C) a p value;a p value 
D) the power;the power

Question 5

A researcher obtains z = 1.45 for a one-sample z test.What is the decision for this test at a .05 level of significance?

Accepted Answer

A) to reject the null hypothesis 
B) to retain the null hypothesis 
C) It depends on whether the test is one-tailed or two-tailed. 
D) There is not enough information to make a decision. 
A) to reject the null hypothesis 
B) to retain the null hypothesis 
C) It depends on whether the test is one-tailed or two-tailed. 
D) There is not enough information to make a decision.

Question 6

What are the two decisions that researchers can make in hypothesis testing?

Accepted Answer

A) accept or reject the null hypothesis 
B) retain or reject the null hypothesis 
C) both A and B are correct 
A) accept or reject the null hypothesis 
B) retain or reject the null hypothesis 
C) both A and B are correct

Question 7

As sample size increases,the power to detect an effect increases.

Accepted Answer

A) True 
 B)False

Question 8

Given the following values:   = 6.0,M = 7.6,n = 36,   = 6,conduct a one-sample z test at a .05 level of significance.For a one-tailed test,upper-tail critical,what is the decision?

Accepted Answer

A) to reject the null hypothesis 
B) to retain the null hypothesis 
C) There is not enough information since the sample size is not given. 
A) to reject the null hypothesis 
B) to retain the null hypothesis 
C) There is not enough information since the sample size is not given.

Question 9

Based on the effect size conventions,d = 0.99 is a

Accepted Answer

A) small effect size 
B) medium effect size 
C) large effect size 
A) small effect size 
B) medium effect size 
C) large effect size

Question 10

A researcher believes that increasing attention given to children will improve mean academic performance.Therefore,the alternative hypothesis should be:

Accepted Answer

A) mean academic performance will increase 
B) mean academic performance will decrease 
C) mean academic performance will not change 
D) mean attention will increase 
A) mean academic performance will increase 
B) mean academic performance will decrease 
C) mean academic performance will not change 
D) mean attention will increase

Question 11

A researcher conducts two studies.Each study was a one-sample z test.Both studies placed the rejection region in both tails and measured the same sample mean.The alpha level in Study 1 was larger than the alpha level used in Study 2.Which study is associated with greater power to detect an effect?

Accepted Answer

A) Study 1 
B) Study 2 
C) They are associated with the same level of power. 
A) Study 1 
B) Study 2 
C) They are associated with the same level of power.

Question 12

The null hypothesis and alternative hypotheses are statements about parameters in the population.

Accepted Answer

A) True 
 B)False

Question 13

Hypothesis testing is also called

Accepted Answer

A) Type III error 
B) random testing 
C) effect size 
D) significance testing 
A) Type III error 
B) random testing 
C) effect size 
D) significance testing

Question 14

The test statistic determines whether or not an effect exists in a population;effect size measures the size of an observed effect in a population.

Accepted Answer

A) True 
 B)False

Question 15

Assuming that the rejection region is placed in the correct tail,the power of detecting an effect is larger for one-tailed tests compared with two-tailed tests.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following is not one of the four steps to hypothesis testing?

Accepted Answer

A) state the hypotheses 
B) evaluate the plan 
C) set the criteria for a decision 
D) compute the test statistic 
A) state the hypotheses 
B) evaluate the plan 
C) set the criteria for a decision 
D) compute the test statistic

Question 17

Based on the effect size conventions,d = 0.60 is a

Accepted Answer

A) small effect size 
B) medium effect size 
C) large effect size 
A) small effect size 
B) medium effect size 
C) large effect size

Question 18

In hypothesis testing,a researcher can never

Accepted Answer

A) compute a test statistic before making a decision 
B) make decisions about the null hypothesis 
C) prove that his or her hypothesis is correct 
D) know the likelihood of obtaining a sample mean if the null hypothesis were true 
A) compute a test statistic before making a decision 
B) make decisions about the null hypothesis 
C) prove that his or her hypothesis is correct 
D) know the likelihood of obtaining a sample mean if the null hypothesis were true

Question 19

As effect size increases,the power to detect an effect decreases.

Accepted Answer

A) True 
 B)False

Question 20

The criteria for a decision regarding the value stated in a null hypothesis is set by the

Accepted Answer

A) level of significance 
B) p value 
C) probability value 
D) both A and B 
A) level of significance 
B) p value 
C) probability value 
D) both A and B

If the value of the test statistic is in the rejection region,then

A Type III error is only possible for hypothesis tests where the rejection region is located in one tail.

The alpha level must be split into each tail for a directional hypothesis test.

The probability of committing a Type I error is stated by ;the probability for committing a Type II error is stated by .

A researcher obtains z = 1.45 for a one-sample z test.What is the decision for this test at a .05 level of significance?

What are the two decisions that researchers can make in hypothesis testing?

As sample size increases,the power to detect an effect increases.

Given the following values: = 6.0,M = 7.6,n = 36, = 6,conduct a one-sample z test at a .05 level of significance.For a one-tailed test,upper-tail critical,what is the decision?

Based on the effect size conventions,d = 0.99 is a

A researcher believes that increasing attention given to children will improve mean academic performance.Therefore,the alternative hypothesis should be:

A researcher conducts two studies.Each study was a one-sample z test.Both studies placed the rejection region in both tails and measured the same sample mean.The alpha level in Study 1 was larger than the alpha level used in Study 2.Which study is associated with greater power to detect an effect?

The null hypothesis and alternative hypotheses are statements about parameters in the population.

Hypothesis testing is also called

The test statistic determines whether or not an effect exists in a population;effect size measures the size of an observed effect in a population.

Assuming that the rejection region is placed in the correct tail,the power of detecting an effect is larger for one-tailed tests compared with two-tailed tests.

Which of the following is not one of the four steps to hypothesis testing?

Based on the effect size conventions,d = 0.60 is a

In hypothesis testing,a researcher can never

As effect size increases,the power to detect an effect decreases.

The criteria for a decision regarding the value stated in a null hypothesis is set by the

Introduction to Statistics

Summarizing Data: Frequency Distributions in Tables and Graphs

Summarizing Data: Central Tendency

Summarizing Data: Variability

Probability

Probability, Normal Distributions, and Z Scores

Probability and Sampling Distributions

Testing Means: One-Sample and Two-Independent Sample T Tests

Testing Means: Related Samples T Test

Estimation and Confidence Intervals

Analysis of Variance: One-Way Between-Subjects Design

Analysis of Variance: One-Way Within-Subjects Repeated Measures Design

Analysis of Variance: Two-Way Between-Subjects Factorial Design

Correlation

Linear Regression and Multiple Regression

Nonparametric Tests: Chi-Square Tests

Nonparametric Tests: Tests for Ordinal Data

Filters

Exam 8: Hypothesis Testing: Significance, Effect Size, and Power

If the value of the test statistic is in the rejection region,then

A Type III error is only possible for hypothesis tests where the rejection region is located in one tail.

The alpha level must be split into each tail for a directional hypothesis test.

The probability of committing a Type I error is stated by ________;the probability for committing a Type II error is stated by ________.

A researcher obtains z = 1.45 for a one-sample z test.What is the decision for this test at a .05 level of significance?

What are the two decisions that researchers can make in hypothesis testing?

As sample size increases,the power to detect an effect increases.

Given the following values: = 6.0,M = 7.6,n = 36, = 6,conduct a one-sample z test at a .05 level of significance.For a one-tailed test,upper-tail critical,what is the decision?

Based on the effect size conventions,d = 0.99 is a

A researcher believes that increasing attention given to children will improve mean academic performance.Therefore,the alternative hypothesis should be:

A researcher conducts two studies.Each study was a one-sample z test.Both studies placed the rejection region in both tails and measured the same sample mean.The alpha level in Study 1 was larger than the alpha level used in Study 2.Which study is associated with greater power to detect an effect?

The null hypothesis and alternative hypotheses are statements about parameters in the population.

Hypothesis testing is also called

The test statistic determines whether or not an effect exists in a population;effect size measures the size of an observed effect in a population.

Assuming that the rejection region is placed in the correct tail,the power of detecting an effect is larger for one-tailed tests compared with two-tailed tests.

Which of the following is not one of the four steps to hypothesis testing?

Based on the effect size conventions,d = 0.60 is a

In hypothesis testing,a researcher can never

As effect size increases,the power to detect an effect decreases.

The criteria for a decision regarding the value stated in a null hypothesis is set by the

Introduction to Statistics

Summarizing Data: Frequency Distributions in Tables and Graphs

Summarizing Data: Central Tendency

Summarizing Data: Variability

Probability

Probability, Normal Distributions, and Z Scores

Probability and Sampling Distributions

Testing Means: One-Sample and Two-Independent Sample T Tests

Testing Means: Related Samples T Test

Estimation and Confidence Intervals

Analysis of Variance: One-Way Between-Subjects Design

Analysis of Variance: One-Way Within-Subjects Repeated Measures Design

Analysis of Variance: Two-Way Between-Subjects Factorial Design

Correlation

Linear Regression and Multiple Regression

Nonparametric Tests: Chi-Square Tests

Nonparametric Tests: Tests for Ordinal Data

Filters

The probability of committing a Type I error is stated by ;the probability for committing a Type II error is stated by .