Question 1

The chi-square statistic ________.

Accepted Answer

A) is greater than or equal to zero 
B) is less than or equal to zero 
C) can be any value 
D) is equal to zero 
A) is greater than or equal to zero 
B) is less than or equal to zero 
C) can be any value 
D) is equal to zero

Question 2

The use of the chi-square statistic would be permissible in the following goodness-of-fit test.

Accepted Answer

A) True 
 B)False

Question 3

Recently,students in a marketing research class were interested in the driving behavior of students. Specifically,the marketing students were interested in finding out if exceeding the speed limit was related to gender. They collected the following responses from 100 randomly selected students:   The null hypothesis for the analysis is ________.

Accepted Answer

A) there is no relationship between gender and speeding 
B) the correlation between driving behavior and gender is zero 
C) as driving behavior increases,gender increases 
D) the mean of driving behavior equals the mean of gender 
A) there is no relationship between gender and speeding 
B) the correlation between driving behavior and gender is zero 
C) as driving behavior increases,gender increases 
D) the mean of driving behavior equals the mean of gender

Question 4

Some important uses of the chi-square distribution include ________.

Accepted Answer

A) testing for goodness-of-fit 
B) determining whether a variable appears to follow some specified distribution 
C) testing for the association of two categorical variables 
D) all of these answers are true. 
A) testing for goodness-of-fit 
B) determining whether a variable appears to follow some specified distribution 
C) testing for the association of two categorical variables 
D) all of these answers are true.

Question 5

To test the hypothesis that 55% of those families who plan to purchase a vacation residence in Florida want a condominium,the null hypothesis is π = 0.55 and the alternate is π ≠ 0.55. A random sample of 400 families who planned to buy a vacation residence revealed that 228 families want a condominium. What decision should be made regarding the null hypothesis using the 0.01 level of significance?

Accepted Answer

A) Do not reject it. 
B) Reject it. 
C) Cannot accept it or reject it based on the information given. 
D) Purchase a condominium. 
A) Do not reject it. 
B) Reject it. 
C) Cannot accept it or reject it based on the information given. 
D) Purchase a condominium.

Question 6

The chi-square distribution is ________.

Accepted Answer

A) positively skewed 
B) negatively skewed 
C) normally distributed 
D) uniformly distributed 
A) positively skewed 
B) negatively skewed 
C) normally distributed 
D) uniformly distributed

Question 7

A personnel manager is concerned about absenteeism. She decides to sample employee records to determine if absenteeism is distributed evenly throughout the six-day workweek. The null hypothesis is: Absenteeism is distributed evenly throughout the week. The 0.01 level is to be used. The sample results are:   What is the critical value of a chi-square with α = 0.05?

Accepted Answer

A) 11.070 
B) 12.592 
C) 13.388 
D) 15.033 
A) 11.070 
B) 12.592 
C) 13.388 
D) 15.033

Question 8

The chi-square test statistic used in a goodness-of-fit test has k − 1 degrees of freedom.

Accepted Answer

A) True 
 B)False

Question 9

Based on the Nielsen ratings,the local CBS affiliate claims its 11 p.m. newscast reaches 41% of the viewing audience in the area. In a survey of 100 viewers,36% indicated that they watch the late evening news on this local CBS station. What is your decision if α = 0.01?

Accepted Answer

A) Fail to reject the null hypothesis. 
B) Reject the null hypothesis and conclude the newscast does not reach 41% of the audience. 
C) Fail to reject the alternate and conclude the newscast does not reach 41% of the audience. 
D) Reject the alternate and conclude the newscast reaches about 41% of the audience. 
A) Fail to reject the null hypothesis. 
B) Reject the null hypothesis and conclude the newscast does not reach 41% of the audience. 
C) Fail to reject the alternate and conclude the newscast does not reach 41% of the audience. 
D) Reject the alternate and conclude the newscast reaches about 41% of the audience.

Question 10

It is claimed that in a bushel of peaches,fewer than 10% are defective. A sample of 400 peaches is examined and 50 are found to be defective. If α = 0.025,what will be the decision?

Accepted Answer

A) Accept the null. 
B) Reject the null and conclude the defects are not greater than 10%. 
C) Reject the null and conclude the defects are greater than 10%. 
D) Fail to reject the null. 
A) Accept the null. 
B) Reject the null and conclude the defects are not greater than 10%. 
C) Reject the null and conclude the defects are greater than 10%. 
D) Fail to reject the null.

Question 11

The degrees of freedom for a contingency table with six rows and three columns is ________.

Accepted Answer

A) 18 
B) 9 
C) 10 
D) 3 
A) 18 
B) 9 
C) 10 
D) 3

Question 12

Which of the following assumptions is necessary to apply a goodness-of-fit test?

Accepted Answer

A) The population must be normally distributed. 
B) The data are measured with a nominal or ordinal scale. 
C) The population variance must be known. 
D) The population mean must be known. 
A) The population must be normally distributed. 
B) The data are measured with a nominal or ordinal scale. 
C) The population variance must be known. 
D) The population mean must be known.

Question 13

Based on the Nielsen ratings,the local CBS affiliate claims its 11 p.m. newscast reaches 41% of the viewing audience in the area. In a survey of 100 viewers,36% indicated that they watch the late evening news on this local CBS station. What is the sample proportion?

Accepted Answer

A) 0.41 
B) 0.36% 
C) 0.41% 
D) 0.36 
A) 0.41 
B) 0.36% 
C) 0.41% 
D) 0.36

Question 14

It is claimed that in a bushel of peaches,fewer than 10% are defective. A sample of 400 peaches is examined and 50 are found to be defective. What is the critical value for α = 0.025?

Accepted Answer

A) +1.960 
B) ±1.645 
C) −1.960 
D) −1.645 
A) +1.960 
B) ±1.645 
C) −1.960 
D) −1.645

Question 15

The sample proportion is defined as ________.

Accepted Answer

A) nπ 
B) x/n 
C) n! 
D) π 
A) nπ 
B) x/n 
C) n! 
D) π

Question 16

How is a pooled estimate of the population proportion represented?

Accepted Answer

A) pc 
B) z 
C) π 
D) nπ 
A) pc 
B) z 
C) π 
D) nπ

Question 17

A survey of property owners' opinions about a street-widening project was taken to determine if owners' opinions were related to the distance between their home and the street. A randomly selected sample of 100 property owners was contacted and the results are shown next.   How many degrees of freedom are there?

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
A) 2 
B) 3 
C) 4 
D) 5

Question 18

A recent study of the relationship between social activity and education for a sample of corporate executives showed the following results.   Based on the analysis,what can be concluded?

Accepted Answer

A) Social activity and education are correlated. 
B) Social activity and education are not related. 
C) Social activity and education are related. 
D) No conclusion is possible. 
A) Social activity and education are correlated. 
B) Social activity and education are not related. 
C) Social activity and education are related. 
D) No conclusion is possible.

Question 19

To test if an observed frequency distribution with five classes is normally distributed,we need to ________.

Accepted Answer

A) compute an F-statistic 
B) calculate a t-statistic 
C) convert the class marks to standard normal z-statistics 
D) convert the class limits to standard normal z-statistics 
A) compute an F-statistic 
B) calculate a t-statistic 
C) convert the class marks to standard normal z-statistics 
D) convert the class limits to standard normal z-statistics

Question 20

A sample of 250 adults tried the new multigrain cereal Wow! A total of 187 rated it as excellent. In a sample of 100 children,66 rated it as excellent. Using the 0.1 significance level,the researcher wishes to show that adults like the cereal better than children. Which of the following is the alternate hypothesis?

Accepted Answer

A) H1: πA = πC 
B) H1: πA 1: πA > πC 
D) H1: πA ≠ πC 
A) H1: πA = πC 
B) H1: πA 1: πA > πC 
D) H1: πA ≠ πC

The chi-square statistic ________.

The use of the chi-square statistic would be permissible in the following goodness-of-fit test.

Some important uses of the chi-square distribution include ________.

The chi-square distribution is ________.

The chi-square test statistic used in a goodness-of-fit test has k − 1 degrees of freedom.

Based on the Nielsen ratings,the local CBS affiliate claims its 11 p.m. newscast reaches 41% of the viewing audience in the area. In a survey of 100 viewers,36% indicated that they watch the late evening news on this local CBS station. What is your decision if α = 0.01?

It is claimed that in a bushel of peaches,fewer than 10% are defective. A sample of 400 peaches is examined and 50 are found to be defective. If α = 0.025,what will be the decision?

The degrees of freedom for a contingency table with six rows and three columns is ________.

Which of the following assumptions is necessary to apply a goodness-of-fit test?

Based on the Nielsen ratings,the local CBS affiliate claims its 11 p.m. newscast reaches 41% of the viewing audience in the area. In a survey of 100 viewers,36% indicated that they watch the late evening news on this local CBS station. What is the sample proportion?

It is claimed that in a bushel of peaches,fewer than 10% are defective. A sample of 400 peaches is examined and 50 are found to be defective. What is the critical value for α = 0.025?

The sample proportion is defined as ________.

How is a pooled estimate of the population proportion represented?

A recent study of the relationship between social activity and education for a sample of corporate executives showed the following results. Based on the analysis,what can be concluded?

To test if an observed frequency distribution with five classes is normally distributed,we need to ________.

What Is Statistics

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation

Describing Data: Numerical Measures

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Correlation and Linear Regression

Multiple Regression Analysis

Nonparametric Methods: Analysis of Ordinal Data

Index Numbers

Time Series and Forecasting

Statistical Process Control and Quality Management

An Introduction to Decision Theory

Filters

Exam 15: Nonparametric Methods: Nominal Level Hypothesis Tests

The chi-square statistic ________.

The use of the chi-square statistic would be permissible in the following goodness-of-fit test.

Some important uses of the chi-square distribution include ________.

The chi-square distribution is ________.

The chi-square test statistic used in a goodness-of-fit test has k − 1 degrees of freedom.

Based on the Nielsen ratings,the local CBS affiliate claims its 11 p.m. newscast reaches 41% of the viewing audience in the area. In a survey of 100 viewers,36% indicated that they watch the late evening news on this local CBS station. What is your decision if α = 0.01?

It is claimed that in a bushel of peaches,fewer than 10% are defective. A sample of 400 peaches is examined and 50 are found to be defective. If α = 0.025,what will be the decision?

The degrees of freedom for a contingency table with six rows and three columns is ________.

Which of the following assumptions is necessary to apply a goodness-of-fit test?

Based on the Nielsen ratings,the local CBS affiliate claims its 11 p.m. newscast reaches 41% of the viewing audience in the area. In a survey of 100 viewers,36% indicated that they watch the late evening news on this local CBS station. What is the sample proportion?

It is claimed that in a bushel of peaches,fewer than 10% are defective. A sample of 400 peaches is examined and 50 are found to be defective. What is the critical value for α = 0.025?

The sample proportion is defined as ________.

How is a pooled estimate of the population proportion represented?

A recent study of the relationship between social activity and education for a sample of corporate executives showed the following results. Based on the analysis,what can be concluded?

To test if an observed frequency distribution with five classes is normally distributed,we need to ________.

What Is Statistics

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation

Describing Data: Numerical Measures

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Correlation and Linear Regression

Multiple Regression Analysis

Nonparametric Methods: Analysis of Ordinal Data

Index Numbers

Time Series and Forecasting

Statistical Process Control and Quality Management

An Introduction to Decision Theory

Filters