Question 1

ANOVA requires ________ assumptions.

Accepted Answer

A) no 
B) two 
C) three 
D) four 
A) no 
B) two 
C) three 
D) four

Question 2

The power of the test depends on ________.

Accepted Answer

A) the true value of the population mean 
B) the level of confidence used 
C) the sample size 
D) all of the above 
A) the true value of the population mean 
B) the level of confidence used 
C) the sample size 
D) all of the above

Question 3

PHStat has a tool for conducting the two-sample hypothesis tests for proportions.The test is called ________.

Accepted Answer

A) Z-test for differences in two means 
B) chi-square test for differences in two proportions 
C) Z-test for the proportions 
D) Z- test for differences in two proportions 
A) Z-test for differences in two means 
B) chi-square test for differences in two proportions 
C) Z-test for the proportions 
D) Z- test for differences in two proportions

Question 4

In one-sample tests for means,if the population standard deviation is unknown,then the sampling distribution of the mean is normal.

Accepted Answer

A) True 
 B)False

Question 5

Identify the p-value.

Accepted Answer

A) 0.1483 
B) 0.2966 
C) 0.8517 
D) 0.7034 
A) 0.1483 
B) 0.2966 
C) 0.8517 
D) 0.7034

Question 6

Hypothesis testing always assumes that ________.

Accepted Answer

A) the alternative hypothesis is true 
B) the null hypothesis is true 
C) the probability of the null hypothesis being true is less than 50% 
D) the probability of the alternative hypothesis being true is less than 50% 
A) the alternative hypothesis is true 
B) the null hypothesis is true 
C) the probability of the null hypothesis being true is less than 50% 
D) the probability of the alternative hypothesis being true is less than 50%

Question 7

What test statistic is evaluated when testing for equality of variances?

Accepted Answer

A) t 
B) Z 
C) χ2 
D) F 
A) t 
B) Z 
C) χ2 
D) F

Question 8

ANOVA is a statistical technique that uses the ________.

Accepted Answer

A) distribution 
B) t-distribution 
C) chi-square distribution 
D) Mann-Whitney distribution 
A) distribution 
B) t-distribution 
C) chi-square distribution 
D) Mann-Whitney distribution

Question 9

The power of the test has a value of ________.

Accepted Answer

A) 1 - α 
B) 1 + β 
C) 1 - β 
D) α - β 
A) 1 - α 
B) 1 + β 
C) 1 - β 
D) α - β

Question 10

When the assumptions underlying ANOVA are violated,________ is used.

Accepted Answer

A) the Tukey-Kramer multiple comparison procedure 
B) the Levene test 
C) a nonparametric test 
D) a chi-square test 
A) the Tukey-Kramer multiple comparison procedure 
B) the Levene test 
C) a nonparametric test 
D) a chi-square test

Question 11

The decision to reject or fail to reject a null hypothesis is based on computing a ________ from sample data.

Accepted Answer

A) population parameter 
B) critical value 
C) level of significance 
D) test statistic 
A) population parameter 
B) critical value 
C) level of significance 
D) test statistic

Question 12

The chi‐square test statistic for a one-sample test for the variance is ________.

Accepted Answer

A)    = (n - 1)   /   
B)    = (n - 1)s /   
C)    = (n - 1)   /   
D)    = (n - 1)   /   
A)    = (n - 1)   /   
B)    = (n - 1)s /   
C)    = (n - 1)   /   
D)    = (n - 1)   /

Question 13

The confidence coefficient is denoted by ________.

Accepted Answer

A) 1 - β / 2 
B) 1 - β 
C) 1 - P(
A)  
D) 1 - α 
A) 1 - β / 2 
B) 1 - β 
C) 1 - P(
A)  
D) 1 - α

Question 14

Use the below information to answer the following question(s).
The table below shows the sample data for color preferences by gender.    
-Formulate the hypotheses to whether the proportion of females who prefer a particular category of color is no different from the proportion of males.

Accepted Answer

The chi‐square test for independence tes

Question 15

The area that overlaps the hypothesized distribution in the acceptance region is α,the probability of a Type I error.

Accepted Answer

A) True 
 B)False

Question 16

Increasing the sample size is one way to ________.

Accepted Answer

A) reduce β 
B) reduce the power of the test 
C) increase the standard error of the mean 
D) determine the exact β value 
A) reduce β 
B) reduce the power of the test 
C) increase the standard error of the mean 
D) determine the exact β value

Question 17

Use the below information to answer the following question(s).
The following table provides data on a sample of customers who visited a local restaurant.The restaurant owner believes that the average profit per customer exceeds $25.  
-Which of the following is the conclusion?

Accepted Answer

A) The null hypothesis that the average profit per customer exceeds $25 cannot be rejected. 
B) The null hypothesis that the average profit per customer does not exceed $25 is rejected. 
C) The null hypothesis that the average profit per customer does not exceed $25 cannot be rejected. 
D) The null hypothesis that the average profit per customer exceeds $25 is rejected. 
A) The null hypothesis that the average profit per customer exceeds $25 cannot be rejected. 
B) The null hypothesis that the average profit per customer does not exceed $25 is rejected. 
C) The null hypothesis that the average profit per customer does not exceed $25 cannot be rejected. 
D) The null hypothesis that the average profit per customer exceeds $25 is rejected.

Question 18

Use the below information to answer the following question(s).
The following table provides data on a sample of customers who visited a local restaurant.The restaurant owner believes that the average profit per customer exceeds $25.  
-Which of the following is the test statistic?

Accepted Answer

A) 1.717 
B) -1.867 
C) 1.867 
D) -1.826 
A) 1.717 
B) -1.867 
C) 1.867 
D) -1.826

Question 19

A one-tailed test is employed when the null hypothesis ________.

Accepted Answer

A) is structured as "≠" 
B) specifies a direction of relationship 
C) is structured as "=" 
D) falls in the upper tail of the distribution 
A) is structured as "≠" 
B) specifies a direction of relationship 
C) is structured as "=" 
D) falls in the upper tail of the distribution

ANOVA requires ________ assumptions.

The power of the test depends on ________.

PHStat has a tool for conducting the two-sample hypothesis tests for proportions.The test is called ________.

In one-sample tests for means,if the population standard deviation is unknown,then the sampling distribution of the mean is normal.

Identify the p-value.

Hypothesis testing always assumes that ________.

What test statistic is evaluated when testing for equality of variances?

ANOVA is a statistical technique that uses the ________.

The power of the test has a value of ________.

When the assumptions underlying ANOVA are violated,________ is used.

The decision to reject or fail to reject a null hypothesis is based on computing a ________ from sample data.

The chi‐square test statistic for a one-sample test for the variance is ________.

The confidence coefficient is denoted by ________.

Use the below information to answer the following question(s). The table below shows the sample data for color preferences by gender. -Formulate the hypotheses to whether the proportion of females who prefer a particular category of color is no different from the proportion of males.

The area that overlaps the hypothesized distribution in the acceptance region is α,the probability of a Type I error.

Increasing the sample size is one way to ________.

Use the below information to answer the following question(s). The following table provides data on a sample of customers who visited a local restaurant.The restaurant owner believes that the average profit per customer exceeds $25. -Which of the following is the conclusion?

Use the below information to answer the following question(s). The following table provides data on a sample of customers who visited a local restaurant.The restaurant owner believes that the average profit per customer exceeds $25. -Which of the following is the test statistic?

A one-tailed test is employed when the null hypothesis ________.

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

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Exam 5: Hypothesis Testing and Statistical Inference

ANOVA requires ________ assumptions.

The power of the test depends on ________.

PHStat has a tool for conducting the two-sample hypothesis tests for proportions.The test is called ________.

In one-sample tests for means,if the population standard deviation is unknown,then the sampling distribution of the mean is normal.

Identify the p-value.

Hypothesis testing always assumes that ________.

What test statistic is evaluated when testing for equality of variances?

ANOVA is a statistical technique that uses the ________.

The power of the test has a value of ________.

When the assumptions underlying ANOVA are violated,________ is used.

The decision to reject or fail to reject a null hypothesis is based on computing a ________ from sample data.

The chi‐square test statistic for a one-sample test for the variance is ________.

The confidence coefficient is denoted by ________.

Use the below information to answer the following question(s). The table below shows the sample data for color preferences by gender. -Formulate the hypotheses to whether the proportion of females who prefer a particular category of color is no different from the proportion of males.

The area that overlaps the hypothesized distribution in the acceptance region is α,the probability of a Type I error.

Increasing the sample size is one way to ________.

Use the below information to answer the following question(s). The following table provides data on a sample of customers who visited a local restaurant.The restaurant owner believes that the average profit per customer exceeds $25. -Which of the following is the conclusion?

Use the below information to answer the following question(s). The following table provides data on a sample of customers who visited a local restaurant.The restaurant owner believes that the average profit per customer exceeds $25. -Which of the following is the test statistic?

A one-tailed test is employed when the null hypothesis ________.

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