Question 1

As the standard error increases,the precision of an estimate also increases.

Accepted Answer

A) True 
 B)False

Question 2

A researcher reports that college students consume an average of 3.6 alcoholic drinks per week.What is the interval estimate in this example?

Accepted Answer

A)  3.6 
B)  The interval estimate is not given. 
A)  3.6 
B)  The interval estimate is not given.

Question 3

The confidence interval for one sample selected from a population with a known variance is computed using a critical value for which type of test?

Accepted Answer

A)  z test 
B)  t test 
C)  none 
D)  both A and B 
A)  z test 
B)  t test 
C)  none 
D)  both A and B

Question 4

A researcher reduces her level of confidence from 99% to 90%.What will happen to the precision of her estimate?

Accepted Answer

A)  The estimate will be more precise. 
B)  The estimate will be less precise. 
C)  The precision of her estimate will not change. 
D)  It depends on the size of the population. 
A)  The estimate will be more precise. 
B)  The estimate will be less precise. 
C)  The precision of her estimate will not change. 
D)  It depends on the size of the population.

Question 5

If the value stated by a null hypothesis is ______ the confidence interval,then the decision would have likely been to retain the null hypothesis.

Accepted Answer

A)  inside 
B)  outside 
A)  inside 
B)  outside

Question 6

In a sample of 20 participants,a researcher estimates the 95% CI for a sample with a mean of M = 5.4 and an estimated standard error (SM)of 1.6.What is the lower confidence limit for this interval?

Accepted Answer

A)  2.1 
B)  3.8 
C)  7.0 
D)  8.8 
A)  2.1 
B)  3.8 
C)  7.0 
D)  8.8

Question 7

To estimate the population mean for the two-independent-sample t,the sample size must be known.

Accepted Answer

A) True 
 B)False

Question 8

The estimation formula for the one-sample t is M ± t(sM).

Accepted Answer

A) True 
 B)False

Question 9

In a sample of 20 participants,a researcher estimates the 95% CI for a sample with a mean of M = 5.4 and an estimated standard error (SM)of 1.6.What is the upper confidence limit for this interval?

Accepted Answer

A)  2.1 
B)  3.8 
C)  7.0 
D)  8.8 
A)  2.1 
B)  3.8 
C)  7.0 
D)  8.8

Question 10

A researcher compares the height of male executives in the United States to the average height of males ($\mu$ = 67 in.).He determines that the average height of male executives is 70 in.(95% confidence interval [CI] 68-72).Based on this result,what would the decision have been for a hypothesis test?

Accepted Answer

A)  reject the null hypothesis 
B)  retain the null hypothesis 
C)  there is not enough information to answer this question 
A)  reject the null hypothesis 
B)  retain the null hypothesis 
C)  there is not enough information to answer this question

Question 11

A researcher concludes that stress levels are higher following a major versus a minor traffic accident (95% confidence interval [CI] 1.86-3.02).If the null hypothesis stated that there would be no difference (null hypothesis: $\mu$ = 0),then what is the effect size for this confidence interval?

Accepted Answer

A)  Between 1.86% and 3.02% of the variability in stress levels can be accounted for by type of traffic accident. 
B)  Ratings of stress shifted more than 1.86 points in the population. 
C)  Ratings of stress shifted between 1.86 and 3.02 points in the population. 
D)  There is not enough information to answer this question. 
A)  Between 1.86% and 3.02% of the variability in stress levels can be accounted for by type of traffic accident. 
B)  Ratings of stress shifted more than 1.86 points in the population. 
C)  Ratings of stress shifted between 1.86 and 3.02 points in the population. 
D)  There is not enough information to answer this question.

Question 12

If the null hypothesis is outside the confidence interval,then the decision was likely to ______ using hypothesis testing.

Accepted Answer

A)  reject the null hypothesis 
B)  retain the null hypothesis 
A)  reject the null hypothesis 
B)  retain the null hypothesis

Question 13

Which of the following explains why point estimation can be a useful procedure to estimate a population mean?

Accepted Answer

A)  It defines the range of scores within which the population mean is likely to be contained. 
B)  The sample mean is equal to the population mean on average. 
C)  The sample mean is an unbiased estimator of the population mean. 
D)  The sample mean is equal to the population mean on average and the sample mean is an unbiased estimator of the population mean. 
A)  It defines the range of scores within which the population mean is likely to be contained. 
B)  The sample mean is equal to the population mean on average. 
C)  The sample mean is an unbiased estimator of the population mean. 
D)  The sample mean is equal to the population mean on average and the sample mean is an unbiased estimator of the population mean.

Question 14

The smaller the level of confidence,the ______ precise the estimate.

Accepted Answer

A)  more 
B)  less 
A)  more 
B)  less

Question 15

The larger the level of confidence,the ______ precise the interval estimate.

Accepted Answer

A)  more 
B)  less 
A)  more 
B)  less

Question 16

Which of the following best describes the goal of estimation?

Accepted Answer

A)  to determine the extent to which a result is significant 
B)  to estimate the significance of a result 
C)  to narrow in on the true population mean by defining limits within which it is likely to be contained 
D)  to determine the extent to which a result is significant and to estimate the significance of a result 
A)  to determine the extent to which a result is significant 
B)  to estimate the significance of a result 
C)  to narrow in on the true population mean by defining limits within which it is likely to be contained 
D)  to determine the extent to which a result is significant and to estimate the significance of a result

Question 17

When the null hypothesis is outside a confidence interval,this indicates that it would likely be retained with hypothesis testing.

Accepted Answer

A) True 
 B)False

Question 18

Which type of error is used to compute the confidence interval for two independent samples selected from at least one population with an unknown variance?

Accepted Answer

A)  standard error 
B)  estimated standard error 
C)  estimated standard error for the difference 
D)  estimated standard error for the difference scores 
A)  standard error 
B)  estimated standard error 
C)  estimated standard error for the difference 
D)  estimated standard error for the difference scores

Question 19

Which of the following words best describes certainty?

Accepted Answer

A)  inferential 
B)  significance 
C)  precision 
D)  confidence 
A)  inferential 
B)  significance 
C)  precision 
D)  confidence

Question 20

In a sample of 28 participants,a researcher estimates the 95% CI for a sample with a mean of M = 1.5 and an estimated standard error (SM)of 0.3.What is the confidence interval at this level of confidence?

Accepted Answer

A)  95% CI 1.0, 2.0 
B)  95% CI 1.2, 1.8 
C)  95% CI 0.9, 2.1 
D)  there is not enough information to answer this question 
A)  95% CI 1.0, 2.0 
B)  95% CI 1.2, 1.8 
C)  95% CI 0.9, 2.1 
D)  there is not enough information to answer this question

As the standard error increases,the precision of an estimate also increases.

A researcher reports that college students consume an average of 3.6 alcoholic drinks per week.What is the interval estimate in this example?

The confidence interval for one sample selected from a population with a known variance is computed using a critical value for which type of test?

A researcher reduces her level of confidence from 99% to 90%.What will happen to the precision of her estimate?

If the value stated by a null hypothesis is ______ the confidence interval,then the decision would have likely been to retain the null hypothesis.

In a sample of 20 participants,a researcher estimates the 95% CI for a sample with a mean of M = 5.4 and an estimated standard error (S_M)of 1.6.What is the lower confidence limit for this interval?

To estimate the population mean for the two-independent-sample t,the sample size must be known.

The estimation formula for the one-sample t is M ± t(s_M).

In a sample of 20 participants,a researcher estimates the 95% CI for a sample with a mean of M = 5.4 and an estimated standard error (S_M)of 1.6.What is the upper confidence limit for this interval?

A researcher concludes that stress levels are higher following a major versus a minor traffic accident (95% confidence interval [CI] 1.86-3.02).If the null hypothesis stated that there would be no difference (null hypothesis: $\mu$ = 0),then what is the effect size for this confidence interval?

If the null hypothesis is outside the confidence interval,then the decision was likely to ______ using hypothesis testing.

Which of the following explains why point estimation can be a useful procedure to estimate a population mean?

The smaller the level of confidence,the ______ precise the estimate.

The larger the level of confidence,the ______ precise the interval estimate.

Which of the following best describes the goal of estimation?

When the null hypothesis is outside a confidence interval,this indicates that it would likely be retained with hypothesis testing.

Which type of error is used to compute the confidence interval for two independent samples selected from at least one population with an unknown variance?

Which of the following words best describes certainty?

In a sample of 28 participants,a researcher estimates the 95% CI for a sample with a mean of M = 1.5 and an estimated standard error (S_M)of 0.3.What is the confidence interval at this level of confidence?

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

Hypothesis Testing: Significance,effect Size,and Power

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

Testing Means: Truehe Related-Samples T Test

Analysis of Variance: One-Way Between-Subjects Design

Analysis of Variance: One-Way Within-Subjects Repeated-Measuresdesign

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 11: Estimation and Confidence Intervals

As the standard error increases,the precision of an estimate also increases.

A researcher reports that college students consume an average of 3.6 alcoholic drinks per week.What is the interval estimate in this example?

The confidence interval for one sample selected from a population with a known variance is computed using a critical value for which type of test?

A researcher reduces her level of confidence from 99% to 90%.What will happen to the precision of her estimate?

If the value stated by a null hypothesis is ______ the confidence interval,then the decision would have likely been to retain the null hypothesis.

In a sample of 20 participants,a researcher estimates the 95% CI for a sample with a mean of M = 5.4 and an estimated standard error (SM)of 1.6.What is the lower confidence limit for this interval?

To estimate the population mean for the two-independent-sample t,the sample size must be known.

The estimation formula for the one-sample t is M ± t(sM).

In a sample of 20 participants,a researcher estimates the 95% CI for a sample with a mean of M = 5.4 and an estimated standard error (SM)of 1.6.What is the upper confidence limit for this interval?

A researcher concludes that stress levels are higher following a major versus a minor traffic accident (95% confidence interval [CI] 1.86-3.02).If the null hypothesis stated that there would be no difference (null hypothesis: μ\muμ = 0),then what is the effect size for this confidence interval?

If the null hypothesis is outside the confidence interval,then the decision was likely to ______ using hypothesis testing.

Which of the following explains why point estimation can be a useful procedure to estimate a population mean?

The smaller the level of confidence,the ______ precise the estimate.

The larger the level of confidence,the ______ precise the interval estimate.

Which of the following best describes the goal of estimation?

When the null hypothesis is outside a confidence interval,this indicates that it would likely be retained with hypothesis testing.

Which type of error is used to compute the confidence interval for two independent samples selected from at least one population with an unknown variance?

Which of the following words best describes certainty?

In a sample of 28 participants,a researcher estimates the 95% CI for a sample with a mean of M = 1.5 and an estimated standard error (SM)of 0.3.What is the confidence interval at this level of confidence?

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

Hypothesis Testing: Significance,effect Size,and Power

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

Testing Means: Truehe Related-Samples T Test

Analysis of Variance: One-Way Between-Subjects Design

Analysis of Variance: One-Way Within-Subjects Repeated-Measuresdesign

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

In a sample of 20 participants,a researcher estimates the 95% CI for a sample with a mean of M = 5.4 and an estimated standard error (S_M)of 1.6.What is the lower confidence limit for this interval?

The estimation formula for the one-sample t is M ± t(s_M).

In a sample of 20 participants,a researcher estimates the 95% CI for a sample with a mean of M = 5.4 and an estimated standard error (S_M)of 1.6.What is the upper confidence limit for this interval?

A researcher concludes that stress levels are higher following a major versus a minor traffic accident (95% confidence interval [CI] 1.86-3.02).If the null hypothesis stated that there would be no difference (null hypothesis: $\mu$ = 0),then what is the effect size for this confidence interval?

In a sample of 28 participants,a researcher estimates the 95% CI for a sample with a mean of M = 1.5 and an estimated standard error (S_M)of 0.3.What is the confidence interval at this level of confidence?