Question 1

If we fail to reject the null hypothesis,________.

Accepted Answer

A) we have found evidence to support the alternative hypothesis 
B) the null hypothesis is proved to be true 
C) we have only failed to find evidence to support the alternative hypothesis 
D) the hypothesis test is inconclusive 
A) we have found evidence to support the alternative hypothesis 
B) the null hypothesis is proved to be true 
C) we have only failed to find evidence to support the alternative hypothesis 
D) the hypothesis test is inconclusive

Question 2

A chi-square statistic is the sum of the squares of the differences between observed frequency and expected frequency divided by the expected frequency in each cell.

Accepted Answer

A) True 
 B)False

Question 3

The rejection region is defined by ________.

Accepted Answer

A) a critical value 
B) the power of the test 
C) the probability of a Type II error 
D) the sample size 
A) a critical value 
B) the power of the test 
C) the probability of a Type II error 
D) the sample size

Question 4

The chi-square statistic has a chi-square distribution with ________ degrees of freedom.

Accepted Answer

A) n - 1 
B) (n - 1)(n - 2) 
C) (r - 1)(c - 1) 
D) (r - 2)(c - 2) 
A) n - 1 
B) (n - 1)(n - 2) 
C) (r - 1)(c - 1) 
D) (r - 2)(c - 2)

Question 5

Hypothesis testing is a technique that allows you to draw statistically valid conclusions about ________.

Accepted Answer

A) random errors 
B) sample statistics 
C) population parameters 
D) individuals 
A) random errors 
B) sample statistics 
C) population parameters 
D) individuals

Question 6

The chi-square test for independence is used to determine ________.

Accepted Answer

A) the degree to which there is a linear relationship between two variables 
B) the difference between the means of two independent populations 
C) whether the value of a population variance equals the hypothesized value 
D) whether two categorical variables are independent 
A) the degree to which there is a linear relationship between two variables 
B) the difference between the means of two independent populations 
C) whether the value of a population variance equals the hypothesized value 
D) whether two categorical variables are independent

Question 7

Two-tailed tests ________.

Accepted Answer

A) have only lower critical values 
B) have only upper critical values 
C) have both upper and lower critical values 
D) do not have any critical values 
A) have only lower critical values 
B) have only upper critical values 
C) have both upper and lower critical values 
D) do not have any critical values

Question 8

In most practical applications,the population standard deviation will not be known but it is estimated from the ________.

Accepted Answer

A) population 
B) sample 
C) test statistic 
D) t-distribution 
A) population 
B) sample 
C) test statistic 
D) t-distribution

Question 9

Which of the following can be the null hypothesis for a research study that would employ the chi-square test for independence?

Accepted Answer

A) H0: gender and SUV ownership are dependent 
B) H0: gender and SUV ownership are independent 
C) H0: μgender = μSUV ownership 
D) H0: σ2gender = σ2SUV ownership 
A) H0: gender and SUV ownership are dependent 
B) H0: gender and SUV ownership are independent 
C) H0: μgender = μSUV ownership 
D) H0: σ2gender = σ2SUV ownership

Question 10

In general,whenever p-value is less than α,________.

Accepted Answer

A) we reject the null hypothesis 
B) we choose a different level of significance 
C) we fail to reject the null hypothesis 
D) the hypothesis test is inconclusive 
A) we reject the null hypothesis 
B) we choose a different level of significance 
C) we fail to reject the null hypothesis 
D) the hypothesis test is inconclusive

Question 11

The alternative hypothesis is denoted by ________.

Accepted Answer

A) HN 
B) H0 
C) H1 
D) HAl 
A) HN 
B) H0 
C) H1 
D) HAl

Question 12

The Tukey-Kramer multiple comparison procedure allows an investigator to ________.

Accepted Answer

A) evaluate t-tests,ANOVA,regression,and other tests to determine which statistical tool is best for the data at hand 
B) determine which of the means are significantly different,once ANOVA identifies that there is a significant difference among the means of multiple populations 
C) determine if the means of several different groups are equal when the assumptions underlying ANOVA are violated 
D) determine if the means of several different groups are equal,similar to the ANOVA 
A) evaluate t-tests,ANOVA,regression,and other tests to determine which statistical tool is best for the data at hand 
B) determine which of the means are significantly different,once ANOVA identifies that there is a significant difference among the means of multiple populations 
C) determine if the means of several different groups are equal when the assumptions underlying ANOVA are violated 
D) determine if the means of several different groups are equal,similar to the ANOVA

Question 13

The alternative hypothesis ________.

Accepted Answer

A) describes an existing theory or belief that is accepted as correct in the absence of contradictory data. 
B) is based on new information provided by population data. 
C) is based on new information provided by sample data. 
D) is not deemed to be an important part of inferential statistics. 
A) describes an existing theory or belief that is accepted as correct in the absence of contradictory data. 
B) is based on new information provided by population data. 
C) is based on new information provided by sample data. 
D) is not deemed to be an important part of inferential statistics.

Question 14

In one-sample tests for means,the t-Test Statistic is calculated using the formula ________.

Accepted Answer

A) t =   
B) t =   
C) t =      
D) t =   
A) t =   
B) t =   
C) t =      
D) t =

Question 15

Using PHStat,test the hypothesis that the variances of success rates of the students before and after the orientation program are the same.

Accepted Answer

H₀: @#IMG-DLM& = @#IMG-DLM& H₁: @#IMG-DLM& ≠ @#IMG-DLM& @#IMG-DLM& Therefore,it ca

Question 16

The power curve shows the power of the test as a function of ________.

Accepted Answer

A) significance level 
B) sample size 
C) true mean 
D) confidence level 
A) significance level 
B) sample size 
C) true mean 
D) confidence level

Question 17

The null hypothesis ________.

Accepted Answer

A) describes an existing theory or belief that is accepted as correct in the presence of contradictory data 
B) describes an existing theory or belief that is accepted as correct in the absence of contradictory data 
C) is based on new information provided by sample data 
D) is based on new information provided by population data 
A) describes an existing theory or belief that is accepted as correct in the presence of contradictory data 
B) describes an existing theory or belief that is accepted as correct in the absence of contradictory data 
C) is based on new information provided by sample data 
D) is based on new information provided by population data

Question 18

ANOVA allows us to compare the ________ of several different groups.

Accepted Answer

A) variances 
B) means 
C) distributions 
D) proportions 
A) variances 
B) means 
C) distributions 
D) proportions

Question 19

If the null hypothesis is false,it is more likely that the test statistic will ________.

Accepted Answer

A) fall into the nonrejection region 
B) not follow the uniform distribution 
C) fall into the rejection region 
D) not follow the normal distribution 
A) fall into the nonrejection region 
B) not follow the uniform distribution 
C) fall into the rejection region 
D) not follow the normal distribution

Question 20

When do we employ a one-sample test for means?

Accepted Answer

When we wish to compare a mean

If we fail to reject the null hypothesis,________.

A chi-square statistic is the sum of the squares of the differences between observed frequency and expected frequency divided by the expected frequency in each cell.

The rejection region is defined by ________.

The chi-square statistic has a chi-square distribution with ________ degrees of freedom.

Hypothesis testing is a technique that allows you to draw statistically valid conclusions about ________.

The chi-square test for independence is used to determine ________.

Two-tailed tests ________.

In most practical applications,the population standard deviation will not be known but it is estimated from the ________.

Which of the following can be the null hypothesis for a research study that would employ the chi-square test for independence?

In general,whenever p-value is less than α,________.

The alternative hypothesis is denoted by ________.

The Tukey-Kramer multiple comparison procedure allows an investigator to ________.

The alternative hypothesis ________.

In one-sample tests for means,the t-Test Statistic is calculated using the formula ________.

Using PHStat,test the hypothesis that the variances of success rates of the students before and after the orientation program are the same.

The power curve shows the power of the test as a function of ________.

The null hypothesis ________.

ANOVA allows us to compare the ________ of several different groups.

If the null hypothesis is false,it is more likely that the test statistic will ________.

When do we employ a one-sample test for means?

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

If we fail to reject the null hypothesis,________.

A chi-square statistic is the sum of the squares of the differences between observed frequency and expected frequency divided by the expected frequency in each cell.

The rejection region is defined by ________.

The chi-square statistic has a chi-square distribution with ________ degrees of freedom.

Hypothesis testing is a technique that allows you to draw statistically valid conclusions about ________.

The chi-square test for independence is used to determine ________.

Two-tailed tests ________.

In most practical applications,the population standard deviation will not be known but it is estimated from the ________.

Which of the following can be the null hypothesis for a research study that would employ the chi-square test for independence?

In general,whenever p-value is less than α,________.

The alternative hypothesis is denoted by ________.

The Tukey-Kramer multiple comparison procedure allows an investigator to ________.

The alternative hypothesis ________.

In one-sample tests for means,the t-Test Statistic is calculated using the formula ________.

Using PHStat,test the hypothesis that the variances of success rates of the students before and after the orientation program are the same.

The power curve shows the power of the test as a function of ________.

The null hypothesis ________.

ANOVA allows us to compare the ________ of several different groups.

If the null hypothesis is false,it is more likely that the test statistic will ________.

When do we employ a one-sample test for means?

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