Question 1

What is the term for the lower and upper boundaries of a confidence interval?

Accepted Answer

A)  point estimate 
B)  confidence interval 
C)  confidence limits 
D)  interval estimate 
A)  point estimate 
B)  confidence interval 
C)  confidence limits 
D)  interval estimate

Question 2

Use the formula   to calculate the 95% confidence interval for a sample of N = 12 with a mean   = 6.00 and standard error of the mean   = 1.15.

Accepted Answer

A)  95% CI = 6.00 ± 2.53 
B)  95% CI = 6.00 ± 2.07 
C)  95% CI = 6.00 ± 3.57 
D)  95% CI = 6.00 ± 3.35 
A)  95% CI = 6.00 ± 2.53 
B)  95% CI = 6.00 ± 2.07 
C)  95% CI = 6.00 ± 3.57 
D)  95% CI = 6.00 ± 3.35

Question 3

Calculate the lower and upper limits of the 95% confidence interval for a sample with a mean   = 7.00 and a population standard error of the mean   = .50.

Accepted Answer

A)  (6.02, 7.98) 
B)  (6.18, 7.83) 
C)  (5.71, 8.29) 
D)  (4.54, 9.46) 
A)  (6.02, 7.98) 
B)  (6.18, 7.83) 
C)  (5.71, 8.29) 
D)  (4.54, 9.46)

Question 4

If a researcher wants a narrower confidence interval, which of the following would be calculated?

Accepted Answer

A)  99% confidence interval 
B)  95% confidence interval 
C)  90% confidence interval 
D)  85% confidence interval 
A)  99% confidence interval 
B)  95% confidence interval 
C)  90% confidence interval 
D)  85% confidence interval

Question 5

When a researcher moves from a 95% confidence level to a 99% confidence level, the confidence interval for the mean becomes ______.

Accepted Answer

A)  wider 
B)  normally distributed 
C)  statistically significant 
D)  narrower 
A)  wider 
B)  normally distributed 
C)  statistically significant 
D)  narrower

What is the term for the lower and upper boundaries of a confidence interval?

Use the formula to calculate the 95% confidence interval for a sample of N = 12 with a mean = 6.00 and standard error of the mean = 1.15.

Calculate the lower and upper limits of the 95% confidence interval for a sample with a mean = 7.00 and a population standard error of the mean = .50.

If a researcher wants a narrower confidence interval, which of the following would be calculated?

When a researcher moves from a 95% confidence level to a 99% confidence level, the confidence interval for the mean becomes ______.

Introduction to Statistics

Examining Data: Tables and Figures

Measures of Central Tendency

Measures of Variability

Normal Distributions

Probability and Hypothesis Testing

Testing One Sample Mean

Testing the Difference Between Two Means

Errors in Hypothesis Testing, Statistical Power, and Effect Size

One-Way Analysis of Variance Anova

Two-Way Analysis of Variance Anova

Correlation

Linear Regression and Multiple Correlation

Chi-Square

Filters

Exam 8: Estimating the Mean of a Population

What is the term for the lower and upper boundaries of a confidence interval?

Use the formula to calculate the 95% confidence interval for a sample of N = 12 with a mean = 6.00 and standard error of the mean = 1.15.

Calculate the lower and upper limits of the 95% confidence interval for a sample with a mean = 7.00 and a population standard error of the mean = .50.

If a researcher wants a narrower confidence interval, which of the following would be calculated?

When a researcher moves from a 95% confidence level to a 99% confidence level, the confidence interval for the mean becomes ______.

Introduction to Statistics

Examining Data: Tables and Figures

Measures of Central Tendency

Measures of Variability

Normal Distributions

Probability and Hypothesis Testing

Testing One Sample Mean

Testing the Difference Between Two Means

Errors in Hypothesis Testing, Statistical Power, and Effect Size

One-Way Analysis of Variance Anova

Two-Way Analysis of Variance Anova

Correlation

Linear Regression and Multiple Correlation

Chi-Square

Filters