Question 1

A straight line regression model with only one independent variable is called a(n)____________________-order linear model.

Accepted Answer

The answer of A straight line regression model with only...

Question 2

The degrees of freedom for the test statistic in a test of a contingency table is ( r - 1 )( c - 1 )where r is the number of rows in the table, and c is the number of columns.

Accepted Answer

A) True 
 B)False

Question 3

When comparing two population variances, we use the ratio   rather than the difference   .

Accepted Answer

A) True 
 B)False

Question 4

A scatter diagram includes the following data points:   Two regression models are proposed: (1)   , and (2)   . Using the least squares method, which of these regression models provides the better fit to the data? Why?

Accepted Answer

SSE = 4.95 and 126.25 for mode

Question 5

If we square the t -statistic for two means, the result is the ____________________-statistic.

Accepted Answer

The answer of If we square the t -statistic for...

Question 6

We use a t -test to determine whether two population variances are equal.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following conditions is needed regarding the chi-squared test statistic for the test of variance?

Accepted Answer

A) The population random variable must be normal. 
B) The test statistic must be a non-negative number. 
C) The test statistic must have a chi-squared distribution with n - 1 degrees of freedom. 
D) All of these choices are true. 
A) The population random variable must be normal. 
B) The test statistic must be a non-negative number. 
C) The test statistic must have a chi-squared distribution with n - 1 degrees of freedom. 
D) All of these choices are true.

Question 8

Consider a multinomial experiment involving 100 trials and 3 categories (cells). The observed frequencies resulting from the experiment are shown in the accompanying table. 
   Use the 5% significance level to test the hypotheses H 0: p 1 = 0.45, p 2 = 0.30, p 3 = 0.25 vs. H 1: At least two proportions differ from their specified values.

Accepted Answer

Rejection region: c ² > c ²_0.10,3 = 5.991 Test s

Question 9

Another name for the residual term in a regression equation is random error.

Accepted Answer

A) True 
 B)False

Question 10

A chi-squared test is used to describe a population of nominal data.

Accepted Answer

A) True 
 B)False

Question 11

The test statistic for the chi-squared test of a contingency table is the same as the test statistic for the goodness-of-fit test.

Accepted Answer

A) True 
 B)False

Question 12

In the first-order linear regression model, the population parameters of the y -intercept and the slope are, respectively,

Accepted Answer

A) b 0 and b 1 
B) b 0 and b 1 
C) b 0 and b 1 
D) b 0 and b 1 
A) b 0 and b 1 
B) b 0 and b 1 
C) b 0 and b 1 
D) b 0 and b 1

Question 13

Which of the following is not an example illustrating the use of variance?

Accepted Answer

A) As a measure of risk. 
B) As a judge of consistency. 
C) To search for and reduce variability in a process. 
D) All of these choices are true. 
A) As a measure of risk. 
B) As a judge of consistency. 
C) To search for and reduce variability in a process. 
D) All of these choices are true.

Question 14

An inverse relationship between an independent variable x and a dependent variably y means that as x increases, y decreases, and vice versa.

Accepted Answer

A) True 
 B)False

Question 15

The ____________________ adjustment used with the LSD method decreases the experimentwise Type I error rate.

Accepted Answer

The answer of The ____________________ adjustment used with the LSD...

Question 16

Conducting t -tests for each pair or population means is statistically equivalent to conducting one F -test comparing all the population means.

Accepted Answer

A) True 
 B)False

Question 17

In a test of a contingency table, rejecting the null hypothesis concludes the variables are not independent.

Accepted Answer

A) True 
 B)False

Question 18

SSE stands for ____________________ of squares for ____________________.

Accepted Answer

The answer of SSE stands for ____________________ of squares for...

Question 19

In reference to the equation   , the value 0.12 is the average change in y per unit change in x 1, when x 2 is held constant.

Accepted Answer

A) True 
 B)False

Question 20

We use the analysis of variance (ANOVA)technique to compare two or more population means.

Accepted Answer

A) True 
 B)False

A straight line regression model with only one independent variable is called a(n)____________________-order linear model.

The degrees of freedom for the test statistic in a test of a contingency table is ( r - 1 )( c - 1 )where r is the number of rows in the table, and c is the number of columns.

When comparing two population variances, we use the ratio rather than the difference .

A scatter diagram includes the following data points: Two regression models are proposed: (1) , and (2) . Using the least squares method, which of these regression models provides the better fit to the data? Why?

If we square the t -statistic for two means, the result is the ____________________-statistic.

We use a t -test to determine whether two population variances are equal.

Which of the following conditions is needed regarding the chi-squared test statistic for the test of variance?

Another name for the residual term in a regression equation is random error.

A chi-squared test is used to describe a population of nominal data.

The test statistic for the chi-squared test of a contingency table is the same as the test statistic for the goodness-of-fit test.

In the first-order linear regression model, the population parameters of the y -intercept and the slope are, respectively,

Which of the following is not an example illustrating the use of variance?

An inverse relationship between an independent variable x and a dependent variably y means that as x increases, y decreases, and vice versa.

The ____________________ adjustment used with the LSD method decreases the experimentwise Type I error rate.

Conducting t -tests for each pair or population means is statistically equivalent to conducting one F -test comparing all the population means.

In a test of a contingency table, rejecting the null hypothesis concludes the variables are not independent.

SSE stands for of squares for .

In reference to the equation , the value 0.12 is the average change in y per unit change in x ₁, when x ₂ is held constant.

We use the analysis of variance (ANOVA)technique to compare two or more population means.

What Is Statistics

Graphical and Tabular Descriptive Techniques

Numerical Descriptive Techniques

Data Collection and Sampling

Probability

Random Variables and Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions

Introduction to Estimation

Introduction to Hypothesis Testing

Inference About a Population

Inference About Comparing Two Populat

Inference About Comparing Two Populat

Analysis of Variance

Chi-Squared Tests

Simple Linear Regression and Correlat

Multiple Regression

Filters

Exam 18: Review of Statistical Inference

A straight line regression model with only one independent variable is called a(n)____________________-order linear model.

The degrees of freedom for the test statistic in a test of a contingency table is ( r - 1 )( c - 1 )where r is the number of rows in the table, and c is the number of columns.

When comparing two population variances, we use the ratio rather than the difference .

A scatter diagram includes the following data points: Two regression models are proposed: (1) , and (2) . Using the least squares method, which of these regression models provides the better fit to the data? Why?

If we square the t -statistic for two means, the result is the ____________________-statistic.

We use a t -test to determine whether two population variances are equal.

Which of the following conditions is needed regarding the chi-squared test statistic for the test of variance?

Another name for the residual term in a regression equation is random error.

A chi-squared test is used to describe a population of nominal data.

The test statistic for the chi-squared test of a contingency table is the same as the test statistic for the goodness-of-fit test.

In the first-order linear regression model, the population parameters of the y -intercept and the slope are, respectively,

Which of the following is not an example illustrating the use of variance?

An inverse relationship between an independent variable x and a dependent variably y means that as x increases, y decreases, and vice versa.

The ____________________ adjustment used with the LSD method decreases the experimentwise Type I error rate.

Conducting t -tests for each pair or population means is statistically equivalent to conducting one F -test comparing all the population means.

In a test of a contingency table, rejecting the null hypothesis concludes the variables are not independent.

SSE stands for ____________________ of squares for ____________________.

In reference to the equation , the value 0.12 is the average change in y per unit change in x 1, when x 2 is held constant.

We use the analysis of variance (ANOVA)technique to compare two or more population means.

What Is Statistics

Graphical and Tabular Descriptive Techniques

Numerical Descriptive Techniques

Data Collection and Sampling

Probability

Random Variables and Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions

Introduction to Estimation

Introduction to Hypothesis Testing

Inference About a Population

Inference About Comparing Two Populat

Inference About Comparing Two Populat

Analysis of Variance

Chi-Squared Tests

Simple Linear Regression and Correlat

Multiple Regression

Filters

SSE stands for of squares for .

In reference to the equation , the value 0.12 is the average change in y per unit change in x ₁, when x ₂ is held constant.