Question 1

To assess the effect of an intervention such as the productivity of an employee before and after a training class,one would conduct a(n)________.

Accepted Answer

A) independent samples t-test 
B) ANOVA 
C) paired samples t-test 
D) F-test 
A) independent samples t-test 
B) ANOVA 
C) paired samples t-test 
D) F-test C

Question 2

The confidence coefficient is the probability of incorrectly failing to reject the null hypothesis.

Accepted Answer

A) True 
 B)False  False

Question 3

An investigator would like to conduct an independent samples t-test to compare means between two samples.The sample size for each sample is 10.Upon initial evaluation it is found that both samples are not likely to be drawn from normally distributed populations.Further,investigation resulted that the population variances are unknown and are quite different.Should the investigator continue with the analysis? Why or why not?

Accepted Answer

No.Although the population variances are unknown and are not equal,the t-test is not applicable because the populations from which the independent samples are taken are found to be nonnormal.Also,the central limit theorem is not helpful with a small sample size of 10.Therefore,the investigator might consider nonparametric tests that do not require normal distributions.

Question 4

The null hypothesis is based on new information provided by sample data.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following is the commonly used significance level for α,in most business applications?

Accepted Answer

A) 0.5 
B) 0.25 
C) 0.05 
D) 0.0005 
A) 0.5 
B) 0.25 
C) 0.05 
D) 0.0005

Question 6

Apply the Tukey-Kramer multiple comparison procedure to determine the significant differences.

Accepted Answer

The answer of Apply the Tukey-Kramer multiple comparison procedure to...

Question 7

In statistical terminology,educational level is an example of a ________.

Accepted Answer

A) continuous variable 
B) residual 
C) factor 
D) dependent variable 
A) continuous variable 
B) residual 
C) factor 
D) dependent variable

Question 8

Another term for p-value is ________.

Accepted Answer

A) degrees of freedom 
B) random effect 
C) probability density function 
D) observed significance level 
A) degrees of freedom 
B) random effect 
C) probability density function 
D) observed significance level

Question 9

When testing for equality of variances,the test statistic is obtained using the formula ________.

Accepted Answer

A)    =   
B) F =      
C) F =   
D)    =   
A)    =   
B) F =      
C) F =   
D)    =

Question 10

The Excel function CHISQ.TEST()will return the ________.

Accepted Answer

A) probability associated with a t-Test Statistic and the appropriate degrees of freedom 
B) probability associated with the degree of linearity observed within the groups 
C) test for independence: the value from the chi-square distribution for the statistic and the appropriate degrees of freedom 
D) left-tailed probability of the chi-square distribution 
A) probability associated with a t-Test Statistic and the appropriate degrees of freedom 
B) probability associated with the degree of linearity observed within the groups 
C) test for independence: the value from the chi-square distribution for the statistic and the appropriate degrees of freedom 
D) left-tailed probability of the chi-square distribution

Question 11

Use the below information to answer the following question(s).
The table below shows the sample data for color preferences by gender.    
-What is the conclusion?

Accepted Answer

Using a level of significance of 0.05,th

Question 12

The confidence coefficient is ________.

Accepted Answer

A) the probability of correctly failing to reject the null hypothesis 
B) the probability of making a Type II error 
C) the probability of making a Type I error 
D) the probability of correctly rejecting the null hypothesis 
A) the probability of correctly failing to reject the null hypothesis 
B) the probability of making a Type II error 
C) the probability of making a Type I error 
D) the probability of correctly rejecting the null hypothesis

Question 13

Statistical inference is the process of drawing conclusions about ________ from sample data.

Accepted Answer

A) surveys 
B) populations 
C) individuals 
D) sampling errors 
A) surveys 
B) populations 
C) individuals 
D) sampling errors

Question 14

Hypothesis testing can result in ________ different outcomes.

Accepted Answer

A) three 
B) two 
C) five 
D) four 
A) three 
B) two 
C) five 
D) four

Question 15

What is the appropriate alternative hypothesis for the null hypothesis,H0: mean production cost = $2.00?

Accepted Answer

A) H1: mean production cost > $2.00 
B) H1: mean production costs 1: mean production costs ≥ $2.00 
D) H1: mean production costs ≠ $2.00 
A) H1: mean production cost > $2.00 
B) H1: mean production costs 1: mean production costs ≥ $2.00 
D) H1: mean production costs ≠ $2.00

Question 16

Use the below information to answer the following question(s).
The following table shows the number of customers that each of the four counters of a retail store have billed in the past few days.  
-Use ANOVA to test the hypothesis that the mean number of customers is the same for each billing counter.

Accepted Answer

The following hypotheses are tested: H₀:

Question 17

Which of the following is the conclusion?

Accepted Answer

A) We reject H0 that the proportion of female managers is the same as the proportion of male managers. 
B) We should not reject H0 that the proportion of female managers is not the same as the proportion of male managers. 
C) We reject H0 that the proportion of female managers is not the same as the proportion of male managers. 
D) We should not reject H0 that the proportion of female managers is the same as the proportion of male managers. 
A) We reject H0 that the proportion of female managers is the same as the proportion of male managers. 
B) We should not reject H0 that the proportion of female managers is not the same as the proportion of male managers. 
C) We reject H0 that the proportion of female managers is not the same as the proportion of male managers. 
D) We should not reject H0 that the proportion of female managers is the same as the proportion of male managers.

Question 18

What is the greatest limitation of conducting an analysis of variance test when trying to ascertain if there is a statistically significant difference between groups?

Accepted Answer

ANOVA only indicates if there is any sta

Question 19

Compute the 99% confidence interval estimate of the difference between the two proportions.[Hint: Use PHStat]

Accepted Answer

A) (0.139,-0.326) 
B) (0.084,-0.270) 
C) (-0.084,0.270) 
D) (-0.139,0.326) 
A) (0.139,-0.326) 
B) (0.084,-0.270) 
C) (-0.084,0.270) 
D) (-0.139,0.326)

Question 20

The power of the test represents the ________.

Accepted Answer

A) probability of correctly failing to reject the null hypothesis when it is indeed true 
B) probability of incorrectly rejecting the null hypothesis when it is actually true 
C) probability of incorrectly failing to reject the null hypothesis when it is actually false 
D) probability of correctly rejecting the null hypothesis when it is indeed false 
A) probability of correctly failing to reject the null hypothesis when it is indeed true 
B) probability of incorrectly rejecting the null hypothesis when it is actually true 
C) probability of incorrectly failing to reject the null hypothesis when it is actually false 
D) probability of correctly rejecting the null hypothesis when it is indeed false

To assess the effect of an intervention such as the productivity of an employee before and after a training class,one would conduct a(n)________.

The confidence coefficient is the probability of incorrectly failing to reject the null hypothesis.

The null hypothesis is based on new information provided by sample data.

Which of the following is the commonly used significance level for α,in most business applications?

Apply the Tukey-Kramer multiple comparison procedure to determine the significant differences.

In statistical terminology,educational level is an example of a ________.

Another term for p-value is ________.

When testing for equality of variances,the test statistic is obtained using the formula ________.

The Excel function CHISQ.TEST()will return the ________.

Use the below information to answer the following question(s). The table below shows the sample data for color preferences by gender. -What is the conclusion?

The confidence coefficient is ________.

Statistical inference is the process of drawing conclusions about ________ from sample data.

Hypothesis testing can result in ________ different outcomes.

What is the appropriate alternative hypothesis for the null hypothesis,H₀: mean production cost = $2.00?

Which of the following is the conclusion?

What is the greatest limitation of conducting an analysis of variance test when trying to ascertain if there is a statistically significant difference between groups?

Compute the 99% confidence interval estimate of the difference between the two proportions.[Hint: Use PHStat]

The power of the test represents the ________.

Data and Business Decisions

Descriptive Statistics and Data Analysis

Probability Concepts and Distributions

Sampling and Estimation

Regression Analysis

Forecasting

Introduction to Statistical Quality Control

Building and Using Decision Models

Decision Models With Uncertainty and Risk

Decisions, uncertainty, and Risk

Queues and Process Simulation Modeling

Linear Optimization

Integer, nonlinear, and Advanced Optimization Methods

Filters

Exam 5: Hypothesis Testing and Statistical Inference

To assess the effect of an intervention such as the productivity of an employee before and after a training class,one would conduct a(n)________.

The confidence coefficient is the probability of incorrectly failing to reject the null hypothesis.

The null hypothesis is based on new information provided by sample data.

Which of the following is the commonly used significance level for α,in most business applications?

Apply the Tukey-Kramer multiple comparison procedure to determine the significant differences.

In statistical terminology,educational level is an example of a ________.

Another term for p-value is ________.

When testing for equality of variances,the test statistic is obtained using the formula ________.

The Excel function CHISQ.TEST()will return the ________.

Use the below information to answer the following question(s). The table below shows the sample data for color preferences by gender. -What is the conclusion?

The confidence coefficient is ________.

Statistical inference is the process of drawing conclusions about ________ from sample data.

Hypothesis testing can result in ________ different outcomes.

What is the appropriate alternative hypothesis for the null hypothesis,H0: mean production cost = $2.00?

Which of the following is the conclusion?

What is the greatest limitation of conducting an analysis of variance test when trying to ascertain if there is a statistically significant difference between groups?

Compute the 99% confidence interval estimate of the difference between the two proportions.[Hint: Use PHStat]

The power of the test represents the ________.

Data and Business Decisions

Descriptive Statistics and Data Analysis

Probability Concepts and Distributions

Sampling and Estimation

Regression Analysis

Forecasting

Introduction to Statistical Quality Control

Building and Using Decision Models

Decision Models With Uncertainty and Risk

Decisions, uncertainty, and Risk

Queues and Process Simulation Modeling

Linear Optimization

Integer, nonlinear, and Advanced Optimization Methods

Filters

What is the appropriate alternative hypothesis for the null hypothesis,H₀: mean production cost = $2.00?