Question 1

A one-sample t test is used with a sample of 30 scores. The df for this t are.

Accepted Answer

A) 31 
B) 29 
C) 30 d 28 
A) 31 
B) 29 
C) 30 d 28

Question 2

A statement of what must be true if the null hypothesis is false is called a(n) hypothesis.

Accepted Answer

A) population 
B) research 
C) alternative 
D) true 
A) population 
B) research 
C) alternative 
D) true

Question 3

One characteristic of the two hypotheses formulated for a statistical test is that the hypotheses must.

Accepted Answer

A) be statements about the same sample 
B) specify the sample value 
C) be mutually exclusive 
D) be written as a sentence 
A) be statements about the same sample 
B) specify the sample value 
C) be mutually exclusive 
D) be written as a sentence

Question 4

The denominator of the one-sample t test is calculated by dividing by.

Accepted Answer

A)  $s ; N$ 
B)  $S ; \sqrt { N }$ 
C)  $\sigma ; N$ 
D)  $\sigma ; \sqrt { N }$ 
A)  $s ; N$ 
B)  $S ; \sqrt { N }$ 
C)  $\sigma ; N$ 
D)  $\sigma ; \sqrt { N }$

Question 5

The one-sample t test is calculated by dividing the difference of the by the.

Accepted Answer

A) sample mean minus the population mean; standard deviation 
B) sample mean minus the population mean; standard error 
C) individual's score minus the sample mean; standard deviation 
D) individual's score minus the sample mean; standard error 
A) sample mean minus the population mean; standard deviation 
B) sample mean minus the population mean; standard error 
C) individual's score minus the sample mean; standard deviation 
D) individual's score minus the sample mean; standard error

Question 6

Which of the following is true about the t?

Accepted Answer

A) The sampling distribution of t is independent of the df. 
B) The sampling distribution of t for df = 10 is flatter and wider than the sampling distribution for df = 5. 
C) The sampling distribution of t for df = 5 is flatter and wider than the sampling distribution for df = 10. 
D) There is a single sampling distribution of t for all values of df. 
A) The sampling distribution of t is independent of the df. 
B) The sampling distribution of t for df = 10 is flatter and wider than the sampling distribution for df = 5. 
C) The sampling distribution of t for df = 5 is flatter and wider than the sampling distribution for df = 10. 
D) There is a single sampling distribution of t for all values of df.

Question 7

The boundaries of the rejection region or regions are specified by.

Accepted Answer

A) the critical value 
B) alpha 
C) rejection region values 
D) boundary values 
A) the critical value 
B) alpha 
C) rejection region values 
D) boundary values

Question 8

A nonsignificant difference is attributed to.

Accepted Answer

A) the effects of stratified sampling 
B) an insufficiently low alpha value 
C) sampling error 
D) a standard error 
A) the effects of stratified sampling 
B) an insufficiently low alpha value 
C) sampling error 
D) a standard error

Question 9

The null hypothesis establishes a situation under which the theoretical distribution of the test statistic may be obtained.

Accepted Answer

A) normal 
B) mean 
C) sampling 
D) population 
A) normal 
B) mean 
C) sampling 
D) population

Question 10

The concept of degrees of freedom refers to the.

Accepted Answer

A) number of scores plus one used to calculate the sample standard deviation for the one-sample t test 
B) number of scores minus one used to calculate the population standard deviation for a t test 
C) variation in critical values of t with differences in sample size 
D) number of scores that are free to vary when calculating a statistic 
A) number of scores plus one used to calculate the sample standard deviation for the one-sample t test 
B) number of scores minus one used to calculate the population standard deviation for a t test 
C) variation in critical values of t with differences in sample size 
D) number of scores that are free to vary when calculating a statistic

Question 11

When rejection regions are located at both ends of a sampling distribution, a statistical test is used.

Accepted Answer

A) parametric 
B) directional 
C) one-tailed 
D) non-directional 
A) parametric 
B) directional 
C) one-tailed 
D) non-directional

A one-sample t test is used with a sample of 30 scores. The df for this t are.

A statement of what must be true if the null hypothesis is false is called a(n) hypothesis.

One characteristic of the two hypotheses formulated for a statistical test is that the hypotheses must.

The denominator of the one-sample t test is calculated by dividing by.

The one-sample t test is calculated by dividing the difference of the by the.

Which of the following is true about the t?

The boundaries of the rejection region or regions are specified by.

A nonsignificant difference is attributed to.

The null hypothesis establishes a situation under which the theoretical distribution of the test statistic may be obtained.

The concept of degrees of freedom refers to the.

When rejection regions are located at both ends of a sampling distribution, a statistical test is used.

Making Sense of Variability: an Introduction to Statistics

Statistics in the Context of Scientific Research

Looking at Data: Frequency Distributions and Graphs

Looking at Data: Measures of Central Tendency

Looking at Data: Measures of Variability

The Normal Distribution, Probability, and Standard Scores

Understanding Data: Using Statistics for Inference and Estimation

The Basics of Experimentation and Testing for a Difference Between Means

One-Factor Between-Subjects Analysis of Variance

Two-Factor Between-Subjects Analysis of Variance

One-Factor Within-Subjects Analysis of Variance

Correlation: Understanding Covariation

Regression Analysis: Predicting Linear Relationships

Nonparametric Tests

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Exam 8: Is There Really a Difference Introduction to Statistical Hypothesis Testing

A one-sample t test is used with a sample of 30 scores. The df for this t are.

A statement of what must be true if the null hypothesis is false is called a(n) hypothesis.

One characteristic of the two hypotheses formulated for a statistical test is that the hypotheses must.

The denominator of the one-sample t test is calculated by dividing by.

The one-sample t test is calculated by dividing the difference of the by the.

Which of the following is true about the t?

The boundaries of the rejection region or regions are specified by.

A nonsignificant difference is attributed to.

The null hypothesis establishes a situation under which the theoretical distribution of the test statistic may be obtained.

The concept of degrees of freedom refers to the.

When rejection regions are located at both ends of a sampling distribution, a statistical test is used.

Making Sense of Variability: an Introduction to Statistics

Statistics in the Context of Scientific Research

Looking at Data: Frequency Distributions and Graphs

Looking at Data: Measures of Central Tendency

Looking at Data: Measures of Variability

The Normal Distribution, Probability, and Standard Scores

Understanding Data: Using Statistics for Inference and Estimation

The Basics of Experimentation and Testing for a Difference Between Means

One-Factor Between-Subjects Analysis of Variance

Two-Factor Between-Subjects Analysis of Variance

One-Factor Within-Subjects Analysis of Variance

Correlation: Understanding Covariation

Regression Analysis: Predicting Linear Relationships

Nonparametric Tests

Filters