Question 1

Two types of estimation are point estimation and interval estimation.

Accepted Answer

A) True 
 B)False

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

Which type of error is used to compute the confidence interval for one sample selected from a population with a known 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 4

Confidence intervals can be interpreted in terms of the effect size.

Accepted Answer

A) True 
 B)False

Question 5

A researcher states that the average child acquires 2.6 taste aversions in his or her lifetime.This is an example of a point estimate.

Accepted Answer

A) True 
 B)False

Question 6

For the same data,increasing the certainty of an estimate will result in a less precise estimate.

Accepted Answer

A) True 
 B)False

Question 7

In a sample of 26 participants,a researcher estimates the 90% CI for a sample with a mean of   = 0.6 and an estimated standard error for the difference scores (   )of 1.1.What is the upper confidence limit for this interval?

Accepted Answer

A) -1.3 
B) -0.5 
C) 1.7 
D) 2.5 
A) -1.3 
B) -0.5 
C) 1.7 
D) 2.5

Question 8

A researcher reports with 90% confidence that 31% to 37% of Americans believe in ghosts.What is the point estimate for this interval?

Accepted Answer

A) 31% 
B) 34% 
C) 37% 
D) 31% to 37% 
A) 31% 
B) 34% 
C) 37% 
D) 31% to 37%

Question 9

Which type of error is used to compute the confidence interval for two related 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 10

The estimated standard error is used in the formula to estimate the population mean for the one-sample t.

Accepted Answer

A) True 
 B)False

Question 11

In a sample of 17 participants,a researcher estimates the 90% CI for a sample with a mean of   = 7 and an estimated standard error for the difference scores (   )of 2.2.What is the confidence interval at this level of confidence?

Accepted Answer

A) 90% CI 2.4,11.6 
B) 90% CI 3.2,10.8 
C) 90% CI 4.8,9.2 
D) There is not enough information to answer this question. 
A) 90% CI 2.4,11.6 
B) 90% CI 3.2,10.8 
C) 90% CI 4.8,9.2 
D) There is not enough information to answer this question.

Question 12

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 (   )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 13

In a sample of 20 participants,a researcher estimates the 99% CI for a sample with a mean of   = 3.7 and an estimated standard error for the difference scores (   )of 0.2.What is the confidence interval at this level of confidence?

Accepted Answer

A) 99% CI 3.5,3.9 
B) 99% CI 3.2,4.2 
C) 99% CI 3.1,4.3 
D) There is not enough information to answer this question. 
A) 99% CI 3.5,3.9 
B) 99% CI 3.2,4.2 
C) 99% CI 3.1,4.3 
D) There is not enough information to answer this question.

Question 14

The population variance must be known to estimate the population mean for the one-sample z.

Accepted Answer

A) True 
 B)False

Question 15

In a sample of 12 participants,a researcher estimates the 80% CI for a sample with a mean of M = 22.3 and an estimated standard error (   )of 4.7.What is the confidence interval at this level of confidence?

Accepted Answer

A) 80% CI 12.1,32.5 
B) 80% CI 17.6,27.0 
C) 80% CI 15.9,28.7 
D) There is not enough information to answer this question. 
A) 80% CI 12.1,32.5 
B) 80% CI 17.6,27.0 
C) 80% CI 15.9,28.7 
D) There is not enough information to answer this question.

Question 16

A point estimate is associated with a high level of confidence that the estimate is in fact equal to the population mean.

Accepted Answer

A) True 
 B)False

Question 17

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 = 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 18

In a sample of 26 participants,a researcher estimates the 90% CI for a sample with a mean of   = 0.6 and an estimated standard error for the difference scores (   )of 0.1.What is the upper confidence limit for this interval?

Accepted Answer

A) 0.77 
B) -0.5 
C) 1.7 
D) 2.5 
A) 0.77 
B) -0.5 
C) 1.7 
D) 2.5

Question 19

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 20

A researcher estimates the 95% CI for a sample with a mean of M = 3.26 and a standard error (   )of 0.91.What is the lower confidence limit for this interval?

Accepted Answer

A) 1.48 
B) 2.35 
C) 4.17 
D) 5.04 
A) 1.48 
B) 2.35 
C) 4.17 
D) 5.04

Two types of estimation are point estimation and interval estimation.

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

Which type of error is used to compute the confidence interval for one sample selected from a population with a known variance?

Confidence intervals can be interpreted in terms of the effect size.

A researcher states that the average child acquires 2.6 taste aversions in his or her lifetime.This is an example of a point estimate.

For the same data,increasing the certainty of an estimate will result in a less precise estimate.

In a sample of 26 participants,a researcher estimates the 90% CI for a sample with a mean of = 0.6 and an estimated standard error for the difference scores ( )of 1.1.What is the upper confidence limit for this interval?

A researcher reports with 90% confidence that 31% to 37% of Americans believe in ghosts.What is the point estimate for this interval?

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

The estimated standard error is used in the formula to estimate the population mean for the one-sample t.

In a sample of 17 participants,a researcher estimates the 90% CI for a sample with a mean of = 7 and an estimated standard error for the difference scores ( )of 2.2.What is the confidence interval at this level of confidence?

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 ( )of 1.6.What is the upper confidence limit for this interval?

In a sample of 20 participants,a researcher estimates the 99% CI for a sample with a mean of = 3.7 and an estimated standard error for the difference scores ( )of 0.2.What is the confidence interval at this level of confidence?

The population variance must be known to estimate the population mean for the one-sample z.

In a sample of 12 participants,a researcher estimates the 80% CI for a sample with a mean of M = 22.3 and an estimated standard error ( )of 4.7.What is the confidence interval at this level of confidence?

A point estimate is associated with a high level of confidence that the estimate is in fact equal to the population mean.

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 = 0),then what is the effect size for this confidence interval?

In a sample of 26 participants,a researcher estimates the 90% CI for a sample with a mean of = 0.6 and an estimated standard error for the difference scores ( )of 0.1.What is the upper confidence limit for this interval?

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

A researcher estimates the 95% CI for a sample with a mean of M = 3.26 and a standard error ( )of 0.91.What is the lower confidence limit for this interval?

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: Related Samples T Test

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 11: Estimation and Confidence Intervals

Two types of estimation are point estimation and interval estimation.

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

Which type of error is used to compute the confidence interval for one sample selected from a population with a known variance?

Confidence intervals can be interpreted in terms of the effect size.

A researcher states that the average child acquires 2.6 taste aversions in his or her lifetime.This is an example of a point estimate.

For the same data,increasing the certainty of an estimate will result in a less precise estimate.

In a sample of 26 participants,a researcher estimates the 90% CI for a sample with a mean of = 0.6 and an estimated standard error for the difference scores ( )of 1.1.What is the upper confidence limit for this interval?

A researcher reports with 90% confidence that 31% to 37% of Americans believe in ghosts.What is the point estimate for this interval?

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

The estimated standard error is used in the formula to estimate the population mean for the one-sample t.

In a sample of 17 participants,a researcher estimates the 90% CI for a sample with a mean of = 7 and an estimated standard error for the difference scores ( )of 2.2.What is the confidence interval at this level of confidence?

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 ( )of 1.6.What is the upper confidence limit for this interval?

In a sample of 20 participants,a researcher estimates the 99% CI for a sample with a mean of = 3.7 and an estimated standard error for the difference scores ( )of 0.2.What is the confidence interval at this level of confidence?

The population variance must be known to estimate the population mean for the one-sample z.

In a sample of 12 participants,a researcher estimates the 80% CI for a sample with a mean of M = 22.3 and an estimated standard error ( )of 4.7.What is the confidence interval at this level of confidence?

A point estimate is associated with a high level of confidence that the estimate is in fact equal to the population mean.

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 = 0),then what is the effect size for this confidence interval?

In a sample of 26 participants,a researcher estimates the 90% CI for a sample with a mean of = 0.6 and an estimated standard error for the difference scores ( )of 0.1.What is the upper confidence limit for this interval?

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

A researcher estimates the 95% CI for a sample with a mean of M = 3.26 and a standard error ( )of 0.91.What is the lower confidence limit for this interval?

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: Related Samples T Test

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