Question 1

Which of the following is NOT one of the conditions for using the one-sample t test?

Accepted Answer

A) The variable under investigation is quantitative. 
B) The variable under investigation at least approximates interval level characteristics. 
C) The variable under investigation is qualitative and measured on an ordinal level. 
D) The researcher knows the standard deviation estimate. 
A) The variable under investigation is quantitative. 
B) The variable under investigation at least approximates interval level characteristics. 
C) The variable under investigation is qualitative and measured on an ordinal level. 
D) The researcher knows the standard deviation estimate.

Question 2

Under what conditions is it appropriate to use the one sample z test when testing hypotheses about the value of a population mean?

Accepted Answer

When the variable under study is quantit

Question 3

The fourth step in the one sample z test is the conversion of the observed sample mean into a z value to determine how many _____ it is away from _____,assuming the null hypothesis is true.

Accepted Answer

A) standard scores;ó 
B) standard errors;ì 
C) standard deviations;z 
A) standard scores;ó 
B) standard errors;ì 
C) standard deviations;z

Question 4

The hypothesis of "no difference" that is assumed to be true is called the ____________________.

Accepted Answer

The answer of The hypothesis of "no difference" that is...

Question 5

The null hypothesis is the hypothesis that is assumed to be true in statistical hypothesis testing.

Accepted Answer

A) True 
 B)False

Question 6

As a rough guide,investigators generally attempt to achieve statistical power (the probability of correctly rejecting the null hypothesis when it is false.in the range of _____ to _____.

Accepted Answer

A) á to â 
B) 0 to 1.0 
C) .05 to .95 
D) .80 to .95 
A) á to â 
B) 0 to 1.0 
C) .05 to .95 
D) .80 to .95

Question 7

If an observed z or t score is greater than the critical value,we would reject the null hypothesis.

Accepted Answer

A) True 
 B)False

Question 8

Rejection of the null hypothesis when it is true is called a:

Accepted Answer

A) Type I error 
B) Type II error 
C) Type III error 
D) none of these 
A) Type I error 
B) Type II error 
C) Type III error 
D) none of these

Question 9

In the process of hypothesis testing,the investigator begins by stating a proposal,or hypothesis,that is assumed to be:

Accepted Answer

A) True 
 B)False

Question 10

The Publication Manual of the American Psychological Association refers to reporting confidence intervals as the "best reporting strategy" when they are relevant to the statistical test.

Accepted Answer

A) True 
 B)False

Question 11

What does it mean to say that a test is robust to violations of a distributional assumption?

Accepted Answer

When we say that a test is robust to vio

Question 12

Which of the following alternative hypotheses would require using a one-tailed test?

Accepted Answer

A) H1: ì  
100 
B) H1: ì 1: ì > 100 
D) H1: ì = 100 
E) either b or c 
A) H1: ì  
100 
B) H1: ì 1: ì > 100 
D) H1: ì = 100 
E) either b or c

Question 13

The most likely conclusion to make if your observed z exceeds the critical value is the _____.

Accepted Answer

A) null hypothesis is true 
B) the population mean is equal to the value specified in the null hypothesis 
C) the sample mean is different from the population mean 
D) the population mean is different from the value specified in the null hypothesis 
A) null hypothesis is true 
B) the population mean is equal to the value specified in the null hypothesis 
C) the sample mean is different from the population mean 
D) the population mean is different from the value specified in the null hypothesis

Question 14

Rejection of the null hypothesis when it is true is called a Type II error.

Accepted Answer

A) True 
 B)False

Question 15

Confidence intervals are calculated around the observed sample mean rather than ì.

Accepted Answer

A) True 
 B)False

Question 16

When a researcher obtains a result that is consistent with the null hypothesis,he or she _____ the null hypothesis.

Accepted Answer

A) rejects 
B) accepts 
C) fails to accept 
D) fails to reject 
A) rejects 
B) accepts 
C) fails to accept 
D) fails to reject

Question 17

In general,a directional test will always be more powerful than a corresponding nondirectional test if the actual population mean and the hypothesized population mean differ in the specified direction.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following statements is NOT true?

Accepted Answer

A) as a increases,b decreases 
B) as N increases,power increases 
C) as b increases,power increases 
D) as a increases,power increases 
A) as a increases,b decreases 
B) as N increases,power increases 
C) as b increases,power increases 
D) as a increases,power increases

Question 19

Informally,the _____ hypothesis can be thought of as the hypothesis of _____.

Accepted Answer

A) alternative;minimal difference 
B) null;significant difference 
C) null;no difference 
D) alternative;mean difference 
A) alternative;minimal difference 
B) null;significant difference 
C) null;no difference 
D) alternative;mean difference

Question 20

If a researcher sets a critical z value equal to $\pm$1.96,then test statistics falling beyond that range _____.

Accepted Answer

A) suggest the null hypothesis is true 
B) suggest that the alternative hypothesis is false 
C) indicate an error has been made 
D) suggest that the alternative hypothesis is true 
A) suggest the null hypothesis is true 
B) suggest that the alternative hypothesis is false 
C) indicate an error has been made 
D) suggest that the alternative hypothesis is true

Which of the following is NOT one of the conditions for using the one-sample t test?

Under what conditions is it appropriate to use the one sample z test when testing hypotheses about the value of a population mean?

The fourth step in the one sample z test is the conversion of the observed sample mean into a z value to determine how many _ it is away from _,assuming the null hypothesis is true.

The hypothesis of "no difference" that is assumed to be true is called the ____________________.

The null hypothesis is the hypothesis that is assumed to be true in statistical hypothesis testing.

As a rough guide,investigators generally attempt to achieve statistical power (the probability of correctly rejecting the null hypothesis when it is false.in the range of _ to _.

If an observed z or t score is greater than the critical value,we would reject the null hypothesis.

Rejection of the null hypothesis when it is true is called a:

In the process of hypothesis testing,the investigator begins by stating a proposal,or hypothesis,that is assumed to be:

The Publication Manual of the American Psychological Association refers to reporting confidence intervals as the "best reporting strategy" when they are relevant to the statistical test.

What does it mean to say that a test is robust to violations of a distributional assumption?

Which of the following alternative hypotheses would require using a one-tailed test?

The most likely conclusion to make if your observed z exceeds the critical value is the _____.

Rejection of the null hypothesis when it is true is called a Type II error.

Confidence intervals are calculated around the observed sample mean rather than ì.

When a researcher obtains a result that is consistent with the null hypothesis,he or she _____ the null hypothesis.

In general,a directional test will always be more powerful than a corresponding nondirectional test if the actual population mean and the hypothesized population mean differ in the specified direction.

Which of the following statements is NOT true?

Informally,the _ hypothesis can be thought of as the hypothesis of _.

If a researcher sets a critical z value equal to $\pm$ 1.96,then test statistics falling beyond that range _____.

Introduction and Mathematical Preliminaries

Frequency and Probability Distributions

Percentiles percentile Ranks standard Scores and the Normal Distribution

Pearson Correlation and Regression: Descriptive Aspects

Measures of Central Tendency and Variability

Estimation and Sampling Distributions

Probability

Principles of Research Design and Statistical Preliminaries for Analyzing Bivariate Relationships

Independent Groups T -Test

Correlated Groups T-Test

One-Way Repeated Measures Analysis of Variance

Pearson Correlation and Regression: Inferential Aspects

Chi-Square Test

Nonparametric Statistics

Two-Way Between-Subjects Analysis of Variance

Overview and Extension: Statistical Tests for More Complex Designs

Filters

Exam 8: Hypothesis Testing: Inferences About a Single Mean

Which of the following is NOT one of the conditions for using the one-sample t test?

Under what conditions is it appropriate to use the one sample z test when testing hypotheses about the value of a population mean?

The fourth step in the one sample z test is the conversion of the observed sample mean into a z value to determine how many _____ it is away from _____,assuming the null hypothesis is true.

The hypothesis of "no difference" that is assumed to be true is called the ____________________.

The null hypothesis is the hypothesis that is assumed to be true in statistical hypothesis testing.

As a rough guide,investigators generally attempt to achieve statistical power (the probability of correctly rejecting the null hypothesis when it is false.in the range of _____ to _____.

If an observed z or t score is greater than the critical value,we would reject the null hypothesis.

Rejection of the null hypothesis when it is true is called a:

In the process of hypothesis testing,the investigator begins by stating a proposal,or hypothesis,that is assumed to be:

The Publication Manual of the American Psychological Association refers to reporting confidence intervals as the "best reporting strategy" when they are relevant to the statistical test.

What does it mean to say that a test is robust to violations of a distributional assumption?

Which of the following alternative hypotheses would require using a one-tailed test?

The most likely conclusion to make if your observed z exceeds the critical value is the _____.

Rejection of the null hypothesis when it is true is called a Type II error.

Confidence intervals are calculated around the observed sample mean rather than ì.

When a researcher obtains a result that is consistent with the null hypothesis,he or she _____ the null hypothesis.

In general,a directional test will always be more powerful than a corresponding nondirectional test if the actual population mean and the hypothesized population mean differ in the specified direction.

Which of the following statements is NOT true?

Informally,the _____ hypothesis can be thought of as the hypothesis of _____.

If a researcher sets a critical z value equal to ±\pm± 1.96,then test statistics falling beyond that range _____.

Introduction and Mathematical Preliminaries

Frequency and Probability Distributions

Percentiles percentile Ranks standard Scores and the Normal Distribution

Pearson Correlation and Regression: Descriptive Aspects

Measures of Central Tendency and Variability

Estimation and Sampling Distributions

Probability

Principles of Research Design and Statistical Preliminaries for Analyzing Bivariate Relationships

Independent Groups T -Test

Correlated Groups T-Test

One-Way Repeated Measures Analysis of Variance

Pearson Correlation and Regression: Inferential Aspects

Chi-Square Test

Nonparametric Statistics

Two-Way Between-Subjects Analysis of Variance

Overview and Extension: Statistical Tests for More Complex Designs

Filters

The fourth step in the one sample z test is the conversion of the observed sample mean into a z value to determine how many _ it is away from _,assuming the null hypothesis is true.

As a rough guide,investigators generally attempt to achieve statistical power (the probability of correctly rejecting the null hypothesis when it is false.in the range of _ to _.

Informally,the _ hypothesis can be thought of as the hypothesis of _.

If a researcher sets a critical z value equal to $\pm$ 1.96,then test statistics falling beyond that range _____.