Question 1

A(n)____________________ experiment is like a binomial experiment except it contains two or more categories.

Accepted Answer

The answer of A(n)____________________ experiment is like a binomial experiment...

Question 2

A chi-squared test statistic in a test of a contingency table that is equal to zero means:

Accepted Answer

A) The two nominal variables are equal. 
B) The two nominal variables are independent. 
C) The two nominal variables have the same proportions listed in H0. 
D) All of these choices. 
A) The two nominal variables are equal. 
B) The two nominal variables are independent. 
C) The two nominal variables have the same proportions listed in H0. 
D) All of these choices.

Question 3

A Deli proposes to serve 4 main Sandwiches.For planning purposes,the manager expects that the proportions of each that will be selected by her customers will be:   Of a random sample of 100 customers,44 selected chicken,24 selected roast beef,13 selected Pastrami,and 10 selected tuna.Should the manager revise her estimates? Use α = .01.

Accepted Answer

H₀: p₁ = .50,p₂ = .20,p₃ = .10,p₄ = .20 H₁: At

Question 4

If you want to compare two populations that each have more than two categories,which test(s)can you use?

Accepted Answer

You can use a chi-sq

Question 5

For a chi-squared distributed random variable with 10 degrees of freedom and a level of significance of .025,the chi-squared table value is 20.4831.Suppose the value of your test statistic is 16.857.This will lead you to reject the null hypothesis.

Accepted Answer

A) True 
 B)False

Question 6

When we describe a population of nominal data,with exactly two categories,the multinomial experiment is actually a binomial experiment with one of the categorical outcomes labeled "success" and the other labeled "failure".

Accepted Answer

A) True 
 B)False

Question 7

If you want to describe a population with two categories,you can use a(n)____________________ test of p or the chi-squared goodness-of-fit test.

Accepted Answer

The answer of If you want to describe a population...

Question 8

In testing the difference between two proportions using the normal distribution,we may use either a one-tailed or two-tailed test.

Accepted Answer

A) True 
 B)False

Question 9

Which of the following conditions indicate that H0 should be rejected in a goodness-of-fit test?

Accepted Answer

A) The observed frequencies are equal to their expected frequencies. 
B) The test statistic is large. 
C) The degrees of freedom is large. 
D) All of these choices are true. 
A) The observed frequencies are equal to their expected frequencies. 
B) The test statistic is large. 
C) The degrees of freedom is large. 
D) All of these choices are true.

Question 10

To determine whether a single coin is fair,the coin was tossed 200 times.The observed frequencies with which each of the two sides of the coin turned up are recorded as 112 heads and 88 tails.Is the coin fair? Use a=.05

Accepted Answer

H₀: p₁ = .50,p₂ = .50 (the coin is fair) H₁:

Question 11

Student Absenteeism 
Consider a multinomial experiment involving n = 200 students of a large high school.The attendance department recorded the number of students who were absent during the weekdays.The null hypothesis to be tested is: HS1U1B10S1U1B0: pS1U1B11S1U1B0 = .10,pS1U1B12S1U1B0 = .25,pS1U1B13S1U1B0 = .30,pS1U1B14S1U1B0 = .20,pS1U1B15S1U1B0 = .15.
-{Student Absenteeism Narrative} Review the previous results.What is the effect of decreasing the sample size?

Accepted Answer

Note that in each case the values in the

Question 12

Seat Belts 
A study was conducted to determine whether the use of seat belts in vehicles depends on whether or not a child was present in the car.A sample of 1,000 people treated for injuries sustained from vehicle accidents was obtained,and each person was classified according to (1)child present (yes/no)and (2)seat belt usage (worn or not worn)during the accident.The data are shown in the table below.   ​ ​
-{Seat Belts Narrative} At 5% level of significance,what is the proper conclusion?

Accepted Answer

Since χ² = 26.016 > 3.8415,we reject H₀ at

Question 13

The values of a chi-squared distribution are always ____________________ zero.

Accepted Answer

greater th

Question 14

If we want to perform a one-tail test of a population proportion p,we can employ either the z-test of p,or the chi-squared goodness-of-fit test.

Accepted Answer

A) True 
 B)False

Question 15

Consumer panel preferences for three proposed Cafes are as follows:   Use 0.05 level of significance and test to see if there is a preference among the three Cafes,according to the data.

Accepted Answer

H₀: p₁ = p₂ = p₃ = 1/3 H₁: At least one propo

Question 16

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 H0: p1 = .45,p2 = .30,p3 = .25 vs.H1: At least one proportion differs from their specified values.

Accepted Answer

Rejection region: χ² > χ²_.05,2 = 5.991 Test sta

Question 17

To address whether two variables are related in a contingency table,the alternative hypothesis,H1,is:

Accepted Answer

A) The two variables are independent. 
B) The two variables are dependent. 
C) The two variables are equal. 
D) None of these choices. 
A) The two variables are independent. 
B) The two variables are dependent. 
C) The two variables are equal. 
D) None of these choices.

Question 18

Sales Volumes 
A telemarketer makes five calls per day.A sample of 200 days gives the frequencies of sales volumes listed below:   Assume the population is binomial distribution with a probability of purchase p equal to .50.
-{Sales Volumes Narrative} Compute the expected frequencies for x = 0,1,2,3,4,and 5 by using the binomial probability function or the binomial tables.Combine categories if necessary to satisfy the rule of five.

Accepted Answer

The answer of Sales Volumes 
A telemarketer makes five calls...

Question 19

If you want to compare two populations that each have two categories,you can use a z-test for two proportions,or a chi-squared test of a(n)____________________.

Accepted Answer

The answer of If you want to compare two populations...

Question 20

The rule of five requires that the:

Accepted Answer

A) observed frequency for each cell must be at least 5. 
B) degrees of freedom for the test must be at least 5. 
C) expected frequency for each cell must be at least 5. 
D) difference between the observed and expected frequency for each cell must be at least 5. 
A) observed frequency for each cell must be at least 5. 
B) degrees of freedom for the test must be at least 5. 
C) expected frequency for each cell must be at least 5. 
D) difference between the observed and expected frequency for each cell must be at least 5.

A(n)____________________ experiment is like a binomial experiment except it contains two or more categories.

A chi-squared test statistic in a test of a contingency table that is equal to zero means:

If you want to compare two populations that each have more than two categories,which test(s)can you use?

For a chi-squared distributed random variable with 10 degrees of freedom and a level of significance of .025,the chi-squared table value is 20.4831.Suppose the value of your test statistic is 16.857.This will lead you to reject the null hypothesis.

When we describe a population of nominal data,with exactly two categories,the multinomial experiment is actually a binomial experiment with one of the categorical outcomes labeled "success" and the other labeled "failure".

If you want to describe a population with two categories,you can use a(n)____________________ test of p or the chi-squared goodness-of-fit test.

In testing the difference between two proportions using the normal distribution,we may use either a one-tailed or two-tailed test.

Which of the following conditions indicate that H₀ should be rejected in a goodness-of-fit test?

To determine whether a single coin is fair,the coin was tossed 200 times.The observed frequencies with which each of the two sides of the coin turned up are recorded as 112 heads and 88 tails.Is the coin fair? Use a=.05

The values of a chi-squared distribution are always ____________________ zero.

If we want to perform a one-tail test of a population proportion p,we can employ either the z-test of p,or the chi-squared goodness-of-fit test.

Consumer panel preferences for three proposed Cafes are as follows: Use 0.05 level of significance and test to see if there is a preference among the three Cafes,according to the data.

To address whether two variables are related in a contingency table,the alternative hypothesis,H₁,is:

If you want to compare two populations that each have two categories,you can use a z-test for two proportions,or a chi-squared test of a(n)____________________.

The rule of five requires that the:

What Is Statistics

Graphical Descriptive Techniques 1

Graphical Descriptive Techniques 2

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 Populations

Analysis of Variance

Simple Linear Regression and Correlation

Multiple Regression

Model Building

Nonparametric Statistics

Time-Series Analytics and Forecasting

Statistical Process Control

Decision Analysis

Conclusion

Filters

Exam 15: Chi-Squared Tests

A(n)____________________ experiment is like a binomial experiment except it contains two or more categories.

A chi-squared test statistic in a test of a contingency table that is equal to zero means:

If you want to compare two populations that each have more than two categories,which test(s)can you use?

For a chi-squared distributed random variable with 10 degrees of freedom and a level of significance of .025,the chi-squared table value is 20.4831.Suppose the value of your test statistic is 16.857.This will lead you to reject the null hypothesis.

When we describe a population of nominal data,with exactly two categories,the multinomial experiment is actually a binomial experiment with one of the categorical outcomes labeled "success" and the other labeled "failure".

If you want to describe a population with two categories,you can use a(n)____________________ test of p or the chi-squared goodness-of-fit test.

In testing the difference between two proportions using the normal distribution,we may use either a one-tailed or two-tailed test.

Which of the following conditions indicate that H0 should be rejected in a goodness-of-fit test?

To determine whether a single coin is fair,the coin was tossed 200 times.The observed frequencies with which each of the two sides of the coin turned up are recorded as 112 heads and 88 tails.Is the coin fair? Use a=.05

The values of a chi-squared distribution are always ____________________ zero.

If we want to perform a one-tail test of a population proportion p,we can employ either the z-test of p,or the chi-squared goodness-of-fit test.

Consumer panel preferences for three proposed Cafes are as follows: Use 0.05 level of significance and test to see if there is a preference among the three Cafes,according to the data.

To address whether two variables are related in a contingency table,the alternative hypothesis,H1,is:

If you want to compare two populations that each have two categories,you can use a z-test for two proportions,or a chi-squared test of a(n)____________________.

The rule of five requires that the:

What Is Statistics

Graphical Descriptive Techniques 1

Graphical Descriptive Techniques 2

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 Populations

Analysis of Variance

Simple Linear Regression and Correlation

Multiple Regression

Model Building

Nonparametric Statistics

Time-Series Analytics and Forecasting

Statistical Process Control

Decision Analysis

Conclusion

Filters

Which of the following conditions indicate that H₀ should be rejected in a goodness-of-fit test?

To address whether two variables are related in a contingency table,the alternative hypothesis,H₁,is: