Question 1

If we were conducting repeated measures t test, a point estimate would be used to estimate

Accepted Answer

A)  the sample mean difference. 
B)  the population mean difference. 
C)  the difference between sample means. 
D)  the difference between population means. 
A)  the sample mean difference. 
B)  the population mean difference. 
C)  the difference between sample means. 
D)  the difference between population means.

Question 2

Explain the difference between a point estimate and a confidence interval.

Accepted Answer

Point estimates are single values, based

Question 3

Sample statistics are not expected to predict with certainty the values of the population because of

Accepted Answer

A)  sampling error. 
B)  experimenter error. 
C)  confidence error. 
D)  interval error. 
A)  sampling error. 
B)  experimenter error. 
C)  confidence error. 
D)  interval error.

Question 4

Which of the following is NOT true of point estimates?

Accepted Answer

A)  They are based on sample data. 
B)  They are used to estimate the parameters of a population. 
C)  They include adjustments for standard error. 
D)  They are more specific than confidence intervals. 
A)  They are based on sample data. 
B)  They are used to estimate the parameters of a population. 
C)  They include adjustments for standard error. 
D)  They are more specific than confidence intervals.

Question 5

Which is the correct formula for the lower limit of a confidence interval for a repeated measures t test?

Accepted Answer

A)  MD - t (sM
D)  
B)  μD - t (sM
D)  
C)  (μ₁ - μ₂) - t (sM₁-M₂) 
D)  (M₁ - M₂) - t (sM₁-M₂) 
A)  MD - t (sM
D)  
B)  μD - t (sM
D)  
C)  (μ₁ - μ₂) - t (sM₁-M₂) 
D)  (M₁ - M₂) - t (sM₁-M₂)

Question 6

If we wanted to estimate a 90% confidence interval for a one-sample t test with a sample of n = 18, what t-values would we use?

Accepted Answer

A)  ±1.740 
B)  ±1.734 
C)  ±2.101 
D)  ±2.110 
A)  ±1.740 
B)  ±1.734 
C)  ±2.101 
D)  ±2.110

Question 7

For a repeated measures t test, the point estimate would be

Accepted Answer

A)  μ₁ - μ₂ 
B)  M₁ - M₂ 
C)  μD 
D)  MD 
A)  μ₁ - μ₂ 
B)  M₁ - M₂ 
C)  μD 
D)  MD

Question 8

If we were conducting an independent samples t test, a point estimate would be used to estimate

Accepted Answer

A)  the sample mean difference. 
B)  the population mean difference. 
C)  the difference between sample means. 
D)  the difference between population means. 
A)  the sample mean difference. 
B)  the population mean difference. 
C)  the difference between sample means. 
D)  the difference between population means.

Question 9

If we wanted to estimate a 98% confidence interval for an independent samples t test with sample sizes of n = 11 and n = 12, what t-values would we use?

Accepted Answer

A)  ±2.819 
B)  ±2.831 
C)  ±2.518 
D)  ±2.508 
A)  ±2.819 
B)  ±2.831 
C)  ±2.518 
D)  ±2.508

Question 10

The scores for group one in a study are 4, 5, 6, and 7. The scores for group two are 8, 9, 10, 11, and 12. What would the point estimate be for an independent samples t test?

Accepted Answer

A)  -4.50 
B)  +4.50 
C)  +8.00 
D)  10.29 
A)  -4.50 
B)  +4.50 
C)  +8.00 
D)  10.29

Question 11

Given the scores 31, 42, 29, and 35, what is the point estimate for μ?

Accepted Answer

The answer of Given the scores 31, 42, 29, and...

Question 12

A sample mean used to predict a population mean is an example of a

Accepted Answer

A)  sample valuation. 
B)  sample forecast. 
C)  confidence interval. 
D)  point estimate. 
A)  sample valuation. 
B)  sample forecast. 
C)  confidence interval. 
D)  point estimate.

Question 13

When level of confidence is ______, the range of values becomes _______.

Accepted Answer

A)  decreased; broader 
B)  increased; broader 
C)  increased; more specific 
D)  decreased; less specific 
A)  decreased; broader 
B)  increased; broader 
C)  increased; more specific 
D)  decreased; less specific

Question 14

Based on the summary data below, construct a 98% confidence interval for μD.
MD = 11
n = 12

Accepted Answer

LL = 11 - (2.718)(.9

Question 15

If we wanted to make a point estimate for μD, what statistic would we use?

Accepted Answer

Question 16

Based on the summary data below, construct a 99% confidence interval for μ₁ -μ₂.
M₁ = 62 with n₁ = 14 and SS₁ = 501
M₂ = 55 with n₂ = 16 and SS₂ = 441

Accepted Answer

α = .01
df = 28
t = ±2.763
M₁

Question 17

Confidence intervals are _______ specific than point estimates and involve _______ values.

Accepted Answer

A)  more; single 
B)  less; a range of 
C)  more; a range of 
D)  less; single 
A)  more; single 
B)  less; a range of 
C)  more; a range of 
D)  less; single

Question 18

Group One scores 9, 12, 8, 15, and 11. Group Two scores 23, 18, 14, 20, 19, and 17. What is the point estimate for μ₁ - μ₂?

Accepted Answer

The answer of Group One scores 9, 12, 8, 15,...

Question 19

A point estimate

Accepted Answer

A)  is based on population data. 
B)  is a single value. 
C)  is a range of values. 
D)  has a specified degree of confidence. 
A)  is based on population data. 
B)  is a single value. 
C)  is a range of values. 
D)  has a specified degree of confidence.

Question 20

A study was conducted to determine the effectiveness of interval training (alternating between walking and running at a fast pace) on running speed. A sample of n = 9 runners improved their speed on 5K runs after the training by an average of MD = 1.58 minutes with sD = .61. What would the point estimate of the mean difference be in the population?

Accepted Answer

A)  1.58 
B)  .1756 
C)  .1975 
D)  7.77 
A)  1.58 
B)  .1756 
C)  .1975 
D)  7.77

If we were conducting repeated measures t test, a point estimate would be used to estimate

Explain the difference between a point estimate and a confidence interval.

Sample statistics are not expected to predict with certainty the values of the population because of

Which of the following is NOT true of point estimates?

Which is the correct formula for the lower limit of a confidence interval for a repeated measures t test?

If we wanted to estimate a 90% confidence interval for a one-sample t test with a sample of n = 18, what t-values would we use?

For a repeated measures t test, the point estimate would be

If we were conducting an independent samples t test, a point estimate would be used to estimate

If we wanted to estimate a 98% confidence interval for an independent samples t test with sample sizes of n = 11 and n = 12, what t-values would we use?

The scores for group one in a study are 4, 5, 6, and 7. The scores for group two are 8, 9, 10, 11, and 12. What would the point estimate be for an independent samples t test?

Given the scores 31, 42, 29, and 35, what is the point estimate for μ?

A sample mean used to predict a population mean is an example of a

When level of confidence is , the range of values becomes _.

Based on the summary data below, construct a 98% confidence interval for μ_D. M_D = 11 n = 12

If we wanted to make a point estimate for μ_D, what statistic would we use?

Based on the summary data below, construct a 99% confidence interval for μ₁ -μ₂. M₁ = 62 with n₁ = 14 and SS₁ = 501 M₂ = 55 with n₂ = 16 and SS₂ = 441

Confidence intervals are _ specific than point estimates and involve _ values.

Group One scores 9, 12, 8, 15, and 11. Group Two scores 23, 18, 14, 20, 19, and 17. What is the point estimate for μ₁ - μ₂?

A point estimate

Organizing Data Using Tables and Graphs

Measures of Central Tendency

Measures of Variability

Z-Scores and Other Standard Scores

Probability and the Normal Distribution

Sampling Distribution of Means

Hypothesis Testing

One-Sample T-Test

Two-Sample T-Test: Independent Samples Design

Two-Sample T-Test: Related Samples Design

One-Way Analysis of Variance

Factorial Analysis of Variance

Correlation and Regression

Chi-Square

Introduction to Statistics

Nonparametric Statistics for Ordinal Data

Filters

Exam 12: Confidence Interval Versus Point Estimation

If we were conducting repeated measures t test, a point estimate would be used to estimate

Explain the difference between a point estimate and a confidence interval.

Sample statistics are not expected to predict with certainty the values of the population because of

Which of the following is NOT true of point estimates?

Which is the correct formula for the lower limit of a confidence interval for a repeated measures t test?

If we wanted to estimate a 90% confidence interval for a one-sample t test with a sample of n = 18, what t-values would we use?

For a repeated measures t test, the point estimate would be

If we were conducting an independent samples t test, a point estimate would be used to estimate

If we wanted to estimate a 98% confidence interval for an independent samples t test with sample sizes of n = 11 and n = 12, what t-values would we use?

The scores for group one in a study are 4, 5, 6, and 7. The scores for group two are 8, 9, 10, 11, and 12. What would the point estimate be for an independent samples t test?

Given the scores 31, 42, 29, and 35, what is the point estimate for μ?

A sample mean used to predict a population mean is an example of a

When level of confidence is ______, the range of values becomes _______.

Based on the summary data below, construct a 98% confidence interval for μD. MD = 11 n = 12

If we wanted to make a point estimate for μD, what statistic would we use?

Based on the summary data below, construct a 99% confidence interval for μ₁ -μ₂. M₁ = 62 with n₁ = 14 and SS₁ = 501 M₂ = 55 with n₂ = 16 and SS₂ = 441

Confidence intervals are _______ specific than point estimates and involve _______ values.

Group One scores 9, 12, 8, 15, and 11. Group Two scores 23, 18, 14, 20, 19, and 17. What is the point estimate for μ₁ - μ₂?

A point estimate

Organizing Data Using Tables and Graphs

Measures of Central Tendency

Measures of Variability

Z-Scores and Other Standard Scores

Probability and the Normal Distribution

Sampling Distribution of Means

Hypothesis Testing

One-Sample T-Test

Two-Sample T-Test: Independent Samples Design

Two-Sample T-Test: Related Samples Design

One-Way Analysis of Variance

Factorial Analysis of Variance

Correlation and Regression

Chi-Square

Introduction to Statistics

Nonparametric Statistics for Ordinal Data

Filters

When level of confidence is , the range of values becomes _.

Based on the summary data below, construct a 98% confidence interval for μ_D. M_D = 11 n = 12

If we wanted to make a point estimate for μ_D, what statistic would we use?

Confidence intervals are _ specific than point estimates and involve _ values.