Question 1

What is the for the risk set by the researcher for rejecting a null hypothesis when it is TRUE?

Accepted Answer

A) experimental error 
B) error significance 
C) significance level 
D) error level 
A) experimental error 
B) error significance 
C) significance level 
D) error level C

Question 2

Which of the following is a statement of equality?

Accepted Answer

A) research hypothesis 
B) directional hypothesis 
C) nondirectional hypothesis 
D) null hypothesis 
A) research hypothesis 
B) directional hypothesis 
C) nondirectional hypothesis 
D) null hypothesis D

Question 3

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

Accepted Answer

A) True 
 B)False  False

Question 4

Why wouldn't a researcher set the confidence level at .0001,since it's better than .05 and even better than .01?

Accepted Answer

A researcher would not set the Type I le

Question 5

Define power (with regard to hypothesis testing).

Accepted Answer

Power refers to when the resea

Question 6

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

Accepted Answer

A) analysis of variance 
B) dependent samples t-test 
C) regression 
D) independent samples t-test 
A) analysis of variance 
B) dependent samples t-test 
C) regression 
D) independent samples t-test

Question 7

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

Accepted Answer

A) reject the null hypothesis 
B) accept the null hypothesis 
C) set a high p value 
D) increase your sample 
A) reject the null hypothesis 
B) accept the null hypothesis 
C) set a high p value 
D) increase your sample

Question 8

The level of risk that you are willing to take that the results you find are not due to the treatment is expressed as which of the following?

Accepted Answer

A) a significance level 
B) 1 - power 
C) power 
D) 1 + power 
A) a significance level 
B) 1 - power 
C) power 
D) 1 + power

Question 9

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

Accepted Answer

A) regression 
B) dependent-samples t-test 
C) analysis of variance 
D) independent-samples t-test 
A) regression 
B) dependent-samples t-test 
C) analysis of variance 
D) independent-samples t-test

Question 10

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

Accepted Answer

A) regression 
B) dependent-samples t-test 
C) analysis of variance 
D) independent-samples t-test 
A) regression 
B) dependent-samples t-test 
C) analysis of variance 
D) independent-samples t-test

Question 11

What is the term for error that cannot be controlled?

Accepted Answer

A) Type I error 
B) chance 
C) Type II error 
D) probability 
A) Type I error 
B) chance 
C) Type II error 
D) probability

Question 12

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

Accepted Answer

A) regression 
B) analysis of variance 
C) independent-samples t-test 
D) dependent-samples t-test 
A) regression 
B) analysis of variance 
C) independent-samples t-test 
D) dependent-samples t-test

Question 13

What Greek letter is associated with Type II error?

Accepted Answer

A) $\alpha$ 
B) $\beta$ 
C) $\Sigma$ 
D) $\Psi$ 
A) $\alpha$ 
B) $\beta$ 
C) $\Sigma$ 
D) $\Psi$

Question 14

A confidence interval is the best estimate of the range of a population value given the sample value.

Accepted Answer

A) True 
 B)False

Question 15

There is always the possibility of error in statistics because the ______ is not directly tested.

Accepted Answer

A) population 
B) sample 
C) significance 
D) probability 
A) population 
B) sample 
C) significance 
D) probability

Question 16

In order to determine whether you will reject the null hypothesis,the test statistic value must be compared against which of the following?

Accepted Answer

A) obtained value 
B) significance level 
C) critical value 
D) p value 
A) obtained value 
B) significance level 
C) critical value 
D) p value

Question 17

After you provide a statement of the null hypothesis,what action do you take next?

Accepted Answer

A) Select the appropriate test statistic. 
B) Compute the test statistic value. 
C) Set the significance level. 
D) Compare the obtained value with the critical value. 
A) Select the appropriate test statistic. 
B) Compute the test statistic value. 
C) Set the significance level. 
D) Compare the obtained value with the critical value.

Question 18

When you accept the null hypothesis when the null hypothesis is false,you are making a ______.

Accepted Answer

A) Type I error 
B) Type II error 
C) Type III error 
D) power 
A) Type I error 
B) Type II error 
C) Type III error 
D) power

Question 19

Descriptive statistics uses a wide variety of statistical tests and analyses in order to test differences between groups or relationships between variables.

Accepted Answer

A) True 
 B)False

Question 20

Under the normal curve,if the obtained value falls to the left of the critical value.What percentage of the normal curve did it fall under?

Accepted Answer

A) 5% 
B) 10% 
C) 95% 
D) 100% 
A) 5% 
B) 10% 
C) 95% 
D) 100%

What is the for the risk set by the researcher for rejecting a null hypothesis when it is TRUE?

Which of the following is a statement of equality?

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

Why wouldn't a researcher set the confidence level at .0001,since it's better than .05 and even better than .01?

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?

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

The level of risk that you are willing to take that the results you find are not due to the treatment is expressed as which of the following?

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

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

What is the term for error that cannot be controlled?

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

What Greek letter is associated with Type II error?

A confidence interval is the best estimate of the range of a population value given the sample value.

There is always the possibility of error in statistics because the ______ is not directly tested.

In order to determine whether you will reject the null hypothesis,the test statistic value must be compared against which of the following?

After you provide a statement of the null hypothesis,what action do you take next?

When you accept the null hypothesis when the null hypothesis is false,you are making a ______.

Descriptive statistics uses a wide variety of statistical tests and analyses in order to test differences between groups or relationships between variables.

Under the normal curve,if the obtained value falls to the left of the critical value.What percentage of the normal curve did it fall under?

Statistics or Sadistics Its up to You

Means to an End: Computing and Understanding Averages

Understanding Variability: Vive La Différence

A Picture Really Is Worth a Thousand Words

Computing Correlation Coefficients: Ice Cream and Crime

Understanding Reliability and Validity: Just the Truth

Hypotheticals and You: Testing Your Questions

Probability and Why It Counts: Fun With a Bell-Shaped Curve

Only the Lonely: the One Sample Z-Test

Teafor Two: Tests Between the Means of Different Groups

Teafor Two Again: Tests Between the Means of Related Groups

Two Groups Too Many Try Analysis of Variance

Two Too Many Factors: Factorial Analysis of Variancea Brief Introduction

Testing Relationships Using the Correlation Coefficients: Cousins or Just Good Friends

Using Linear Regression: Predicting Wholl Win the Super Bowl

Chi-Square and Some Other Nonparametric Tests: What to Do When Youre Not Normal

Some Other Importantstatistical Procedures You Should Know About

An Introduction to Data Mining

Filters

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

What is the for the risk set by the researcher for rejecting a null hypothesis when it is TRUE?

Which of the following is a statement of equality?

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

Why wouldn't a researcher set the confidence level at .0001,since it's better than .05 and even better than .01?

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?

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

The level of risk that you are willing to take that the results you find are not due to the treatment is expressed as which of the following?

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

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

What is the term for error that cannot be controlled?

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

What Greek letter is associated with Type II error?

A confidence interval is the best estimate of the range of a population value given the sample value.

There is always the possibility of error in statistics because the ______ is not directly tested.

In order to determine whether you will reject the null hypothesis,the test statistic value must be compared against which of the following?

After you provide a statement of the null hypothesis,what action do you take next?

When you accept the null hypothesis when the null hypothesis is false,you are making a ______.

Descriptive statistics uses a wide variety of statistical tests and analyses in order to test differences between groups or relationships between variables.

Under the normal curve,if the obtained value falls to the left of the critical value.What percentage of the normal curve did it fall under?

Statistics or Sadistics Its up to You

Means to an End: Computing and Understanding Averages

Understanding Variability: Vive La Différence

A Picture Really Is Worth a Thousand Words

Computing Correlation Coefficients: Ice Cream and Crime

Understanding Reliability and Validity: Just the Truth

Hypotheticals and You: Testing Your Questions

Probability and Why It Counts: Fun With a Bell-Shaped Curve

Only the Lonely: the One Sample Z-Test

Teafor Two: Tests Between the Means of Different Groups

Teafor Two Again: Tests Between the Means of Related Groups

Two Groups Too Many Try Analysis of Variance

Two Too Many Factors: Factorial Analysis of Variancea Brief Introduction

Testing Relationships Using the Correlation Coefficients: Cousins or Just Good Friends

Using Linear Regression: Predicting Wholl Win the Super Bowl

Chi-Square and Some Other Nonparametric Tests: What to Do When Youre Not Normal

Some Other Importantstatistical Procedures You Should Know About

An Introduction to Data Mining

Filters