Question 1

A research report states "t(8) = 2.00, p > .05." For this test, r2 = 2/10.

Accepted Answer

A) True 
 B)False

Question 2

The t distribution for df = 4 is flatter and more spread out than the t distribution for df = 20.

Accepted Answer

A) True 
 B)False

Question 3

The sample mean will always be exactly in the center of a confidence interval that is estimating the value of the population mean.

Accepted Answer

A) True 
 B)False

Question 4

If random samples, each with n = 20 scores, are selected from a population, and the z-score and t statistic are computed for each sample, the t statistics will be more variable than the z-scores.

Accepted Answer

A) True 
 B)False

Question 5

A sample of n = 25 scores has a mean of M = 40 and a variance of s2 = 100.What is the estimated standard error for the sample mean?

Accepted Answer

A) 4 
B) 2 
C) √2 
D) 1 
A) 4 
B) 2 
C) √2 
D) 1

Question 6

If other factors are held constant, as the sample size increases, the estimated standard error decreases.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following describes what a confidence interval does?

Accepted Answer

A) It uses a sample mean to estimate the corresponding population mean. 
B) It uses a population mean to predict a sample mean. 
C) It uses a level of confidence to estimate a sample mean. 
D) It uses the sample mean to determine a level of confidence. 
A) It uses a sample mean to estimate the corresponding population mean. 
B) It uses a population mean to predict a sample mean. 
C) It uses a level of confidence to estimate a sample mean. 
D) It uses the sample mean to determine a level of confidence.

Question 8

A researcher conducts a hypothesis test using a sample from an unknown population.If the t statistic has df = 35, how many individuals were in the sample?

Accepted Answer

A) n = 34 
B) n = 35 
C) n = 36 
D) cannot be determined from the information given 
A) n = 34 
B) n = 35 
C) n = 36 
D) cannot be determined from the information given

A research report states "t(8) = 2.00, p > .05." For this test, r² = 2/10.

The t distribution for df = 4 is flatter and more spread out than the t distribution for df = 20.

The sample mean will always be exactly in the center of a confidence interval that is estimating the value of the population mean.

If random samples, each with n = 20 scores, are selected from a population, and the z-score and t statistic are computed for each sample, the t statistics will be more variable than the z-scores.

A sample of n = 25 scores has a mean of M = 40 and a variance of s² = 100.What is the estimated standard error for the sample mean?

If other factors are held constant, as the sample size increases, the estimated standard error decreases.

Which of the following describes what a confidence interval does?

A researcher conducts a hypothesis test using a sample from an unknown population.If the t statistic has df = 35, how many individuals were in the sample?

Introduction to Statistics

Frequency Distributions

Central Tendency

Variability

Z-Scores

Probability

The Distribution of Sample Means

Introduction to Hypothesis Testing

The T Test for Two Independent Samples

The T Test for Two Related Samples

Introduction to Analysis of Variance

Repeated-Measures Anova

Two-Factor Analysis of Variance

Correlation

Introduction to Regression

Chi-Square Tests

The Binomial Test

Choosing the Right Statistics

Filters

Exam 9: Introduction to the T Statistic

A research report states "t(8) = 2.00, p > .05." For this test, r2 = 2/10.

The t distribution for df = 4 is flatter and more spread out than the t distribution for df = 20.

The sample mean will always be exactly in the center of a confidence interval that is estimating the value of the population mean.

If random samples, each with n = 20 scores, are selected from a population, and the z-score and t statistic are computed for each sample, the t statistics will be more variable than the z-scores.

A sample of n = 25 scores has a mean of M = 40 and a variance of s2 = 100.What is the estimated standard error for the sample mean?

If other factors are held constant, as the sample size increases, the estimated standard error decreases.

Which of the following describes what a confidence interval does?

A researcher conducts a hypothesis test using a sample from an unknown population.If the t statistic has df = 35, how many individuals were in the sample?

Introduction to Statistics

Frequency Distributions

Central Tendency

Variability

Z-Scores

Probability

The Distribution of Sample Means

Introduction to Hypothesis Testing

The T Test for Two Independent Samples

The T Test for Two Related Samples

Introduction to Analysis of Variance

Repeated-Measures Anova

Two-Factor Analysis of Variance

Correlation

Introduction to Regression

Chi-Square Tests

The Binomial Test

Choosing the Right Statistics

Filters

A research report states "t(8) = 2.00, p > .05." For this test, r² = 2/10.

A sample of n = 25 scores has a mean of M = 40 and a variance of s² = 100.What is the estimated standard error for the sample mean?