Question 1

Which is the correct formula for the lower limit of a confidence interval for an independent samples 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 2

Based on the summary data below, construct an 80% confidence interval forμ₁ - μ₂.
M₁ = 70 with n₁ = 18
M₂ = 64 with n₂ = 15

Accepted Answer

M₁ - M₂ = 70 - 64 = 6 and df =

Question 3

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

Accepted Answer

The answer of If we wanted to make a point...

Question 4

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. If we want to construct a 90% confidence interval for the population mean difference, what t-values should be used.

Accepted Answer

A)  ±2.365 
B)  ±2.306 
C)  ±1.895 
D)  ±1.860 
A)  ±2.365 
B)  ±2.306 
C)  ±1.895 
D)  ±1.860

Question 5

The pre-test scores for a repeated measures test were 6, 8, 10, and 9. The post-test scores for the same participants in the same order were 8, 10, 11, and 12. What would be point estimate be for μD?

Accepted Answer

A)  -1.75 
B)  +1.75 
C)  +2.00 
D)  -2.00 
A)  -1.75 
B)  +1.75 
C)  +2.00 
D)  -2.00

Which is the correct formula for the lower limit of a confidence interval for an independent samples t test?

Based on the summary data below, construct an 80% confidence interval forμ₁ - μ₂. M₁ = 70 with n₁ = 18 M₂ = 64 with n₂ = 15

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

The pre-test scores for a repeated measures test were 6, 8, 10, and 9. The post-test scores for the same participants in the same order were 8, 10, 11, and 12. What would be point estimate be for μ_D?

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

Which is the correct formula for the lower limit of a confidence interval for an independent samples t test?

Based on the summary data below, construct an 80% confidence interval forμ₁ - μ₂. M₁ = 70 with n₁ = 18 M₂ = 64 with n₂ = 15

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

The pre-test scores for a repeated measures test were 6, 8, 10, and 9. The post-test scores for the same participants in the same order were 8, 10, 11, and 12. What would be point estimate be for μD?

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

The pre-test scores for a repeated measures test were 6, 8, 10, and 9. The post-test scores for the same participants in the same order were 8, 10, 11, and 12. What would be point estimate be for μ_D?