Question 1

If zobs does not fall into a rejection region, then the.

Accepted Answer

A) alternative hypothesis is accepted 
B) alternative hypothesis is not rejected 
C) null hypothesis is rejected 
D) null hypothesis is not rejected 
A) alternative hypothesis is accepted 
B) alternative hypothesis is not rejected 
C) null hypothesis is rejected 
D) null hypothesis is not rejected

Question 2

The statistical symbol α is known as.

Accepted Answer

A) gamma 
B) delta 
C) beta 
D) alpha 
A) gamma 
B) delta 
C) beta 
D) alpha

Question 3

The rejection region represents the values of a test statistic that have a probability alpha if is true.

Accepted Answer

A) greater than; H0 
B) greater than; H1 
C) equal to or less than; H0 
D) equal to or less than; H1 
A) greater than; H0 
B) greater than; H1 
C) equal to or less than; H0 
D) equal to or less than; H1

Question 4

In general, the t distribution is than the normal distribution.

Accepted Answer

A) more symmetrical 
B) more peaked and less wide 
C) more negatively skewed 
D) flatter and wider 
A) more symmetrical 
B) more peaked and less wide 
C) more negatively skewed 
D) flatter and wider

Question 5

The degrees of freedom for the one-sample t test are found by.

Accepted Answer

A) N 
B) N - 1 
C) N + 1 
D) N - 2 
A) N 
B) N - 1 
C) N + 1 
D) N - 2

Question 6

Which of the following z values is least likely to occur by chance?

Accepted Answer

A) z = +0.50 
B) z = -1.00 
C) z = -1.50 
D) z = +2.00 
A) z = +0.50 
B) z = -1.00 
C) z = -1.50 
D) z = +2.00

Question 7

Underlying the use of the one-sample t test is the assumption that the.

Accepted Answer

A) distribution of scores in the sample is symmetrical 
B) population variance is equal to the sample variance 
C) degrees of freedom are greater than 30 
D) scores in the population are normally distributed 
A) distribution of scores in the sample is symmetrical 
B) population variance is equal to the sample variance 
C) degrees of freedom are greater than 30 
D) scores in the population are normally distributed

Question 8

The probability of making a Type II error is given by.

Accepted Answer

A)  $\alpha$ 
B)  $1-\alpha$ 
C)  $\beta$ 
D)  $1 - \beta$ 
A)  $\alpha$ 
B)  $1-\alpha$ 
C)  $\beta$ 
D)  $1 - \beta$

Question 9

Degrees of freedom are represented by the abbreviation.

Accepted Answer

A) df 
B) fd 
C) def 
D) degfr 
A) df 
B) fd 
C) def 
D) degfr

Question 10

Statistical tests require both a(n) and a(n) hypothesis.

Accepted Answer

A) null; alternative 
B) primary; secondary 
C) empirical; theoretical 
D) conceptual; testable 
A) null; alternative 
B) primary; secondary 
C) empirical; theoretical 
D) conceptual; testable

Question 11

Which of the following would be an appropriate null hypothesis for the one-sample t test of the hypothesis that the mean reaction time of a population of 45 year-old drivers is 0.653 seconds?

Accepted Answer

A)  $ H_{0}: \bar{X}=0.653 $ 
B)  $ H_{0}: \bar{X} \neq 0.653 $ 
C)  $ H_{0}: \mu=0.653 $ 
D)  $ H_{0}: \mu \neq 0.653 $ 
A)  $ H_{0}: \bar{X}=0.653 $ 
B)  $ H_{0}: \bar{X} \neq 0.653 $ 
C)  $ H_{0}: \mu=0.653 $ 
D)  $ H_{0}: \mu \neq 0.653 $

Question 12

A Type I error occurs if the null hypothesis is when it is.

Accepted Answer

A) rejected; true 
B) not rejected; true 
C) rejected; false 
D) not rejected; false 
A) rejected; true 
B) not rejected; true 
C) rejected; false 
D) not rejected; false

Question 13

If tobs does not fall into a rejection region, then the decision is to.

Accepted Answer

A) reject the null hypothesis 
B) fail to reject the null hypothesis 
C) accept the alternative hypothesis 
D) decrease the value of alpha 
A) reject the null hypothesis 
B) fail to reject the null hypothesis 
C) accept the alternative hypothesis 
D) decrease the value of alpha

Question 14

When H0 is true, expected values of t are distributed symmetrically around a value.

Accepted Answer

A) of zero 
B) of 1.0 
C) of either +1.0 or -1.0 
D) that varies with degrees of freedom 
A) of zero 
B) of 1.0 
C) of either +1.0 or -1.0 
D) that varies with degrees of freedom

Question 15

A parametric statistical test involves hypotheses about.

Accepted Answer

A) sample statistics such as the mean and standard deviation 
B) measures of central tendency such as the mode and median 
C) population values such as the mean and variance 
D) sample measures of central tendency and variability 
A) sample statistics such as the mean and standard deviation 
B) measures of central tendency such as the mode and median 
C) population values such as the mean and variance 
D) sample measures of central tendency and variability

Question 16

Which of the following would be an appropriate alternative hypothesis for the one-sample t test of the hypothesis that the mean reaction time of a population of 45 year-old drivers is 0.653 seconds?

Accepted Answer

A)  $H _ { 1 } : \bar { X } = 0.653$ 
B)  $H _ { 1 } : \bar { X } \neq 0.653$ 
C)  $H _ { 1 } : \mu = 0.653$ 
D)  $H _ { 1 } : \mu \neq 0.653$ 
A)  $H _ { 1 } : \bar { X } = 0.653$ 
B)  $H _ { 1 } : \bar { X } \neq 0.653$ 
C)  $H _ { 1 } : \mu = 0.653$ 
D)  $H _ { 1 } : \mu \neq 0.653$

Question 17

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 written as a sentence 
D) include all possible values of the parameter in the population 
A) be statements about the same sample 
B) specify the sample value 
C) be written as a sentence 
D) include all possible values of the parameter in the population

Question 18

The degrees of freedom determine the the sampling distribution of t.

Accepted Answer

A) mean of 
B) range of values for 
C) variance of 
D) shape of 
A) mean of 
B) range of values for 
C) variance of 
D) shape of

Question 19

A Type I error.

Accepted Answer

A) is more likely to occur with a smaller significance level 
B) is determined by the value of beta 
C) can occur only when the null hypothesis is true 
D) is more likely to occur than a Type II error 
A) is more likely to occur with a smaller significance level 
B) is determined by the value of beta 
C) can occur only when the null hypothesis is true 
D) is more likely to occur than a Type II error

Question 20

Which of the following could be an appropriate null hypothesis for a statistical test concerning the mean income of 17-year old males?

Accepted Answer

A)  $ H_{0}: \bar{X}=\$ 2617 $ 
B)  $ H_{0}: \mu=\$ 2617 $ 
C)  $ H_{0}: \bar{X} \neq \$ 2617 $ 
D)  $ H_{0}: \mu \neq \$ 2617 $ 
A)  $ H_{0}: \bar{X}=\$ 2617 $ 
B)  $ H_{0}: \mu=\$ 2617 $ 
C)  $ H_{0}: \bar{X} \neq \$ 2617 $ 
D)  $ H_{0}: \mu \neq \$ 2617 $

If zobs does not fall into a rejection region, then the.

The statistical symbol α is known as.

The rejection region represents the values of a test statistic that have a probability alpha if is true.

In general, the t distribution is than the normal distribution.

The degrees of freedom for the one-sample t test are found by.

Which of the following z values is least likely to occur by chance?

Underlying the use of the one-sample t test is the assumption that the.

The probability of making a Type II error is given by.

Degrees of freedom are represented by the abbreviation.

Statistical tests require both a(n) and a(n) hypothesis.

Which of the following would be an appropriate null hypothesis for the one-sample t test of the hypothesis that the mean reaction time of a population of 45 year-old drivers is 0.653 seconds?

A Type I error occurs if the null hypothesis is when it is.

If tobs does not fall into a rejection region, then the decision is to.

When H0 is true, expected values of t are distributed symmetrically around a value.

A parametric statistical test involves hypotheses about.

Which of the following would be an appropriate alternative hypothesis for the one-sample t test of the hypothesis that the mean reaction time of a population of 45 year-old drivers is 0.653 seconds?

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

The degrees of freedom determine the the sampling distribution of t.

A Type I error.

Which of the following could be an appropriate null hypothesis for a statistical test concerning the mean income of 17-year old males?

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

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

If zobs does not fall into a rejection region, then the.

The statistical symbol α is known as.

The rejection region represents the values of a test statistic that have a probability alpha if is true.

In general, the t distribution is than the normal distribution.

The degrees of freedom for the one-sample t test are found by.

Which of the following z values is least likely to occur by chance?

Underlying the use of the one-sample t test is the assumption that the.

The probability of making a Type II error is given by.

Degrees of freedom are represented by the abbreviation.

Statistical tests require both a(n) and a(n) hypothesis.

Which of the following would be an appropriate null hypothesis for the one-sample t test of the hypothesis that the mean reaction time of a population of 45 year-old drivers is 0.653 seconds?

A Type I error occurs if the null hypothesis is when it is.

If tobs does not fall into a rejection region, then the decision is to.

When H0 is true, expected values of t are distributed symmetrically around a value.

A parametric statistical test involves hypotheses about.

Which of the following would be an appropriate alternative hypothesis for the one-sample t test of the hypothesis that the mean reaction time of a population of 45 year-old drivers is 0.653 seconds?

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

The degrees of freedom determine the the sampling distribution of t.

A Type I error.

Which of the following could be an appropriate null hypothesis for a statistical test concerning the mean income of 17-year old males?

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