Question 1

A test with a 0.05 significance level has a larger rejection region than a test with a 0.01 significance level.

Accepted Answer

A) True 
 B)False

Question 2

The test statistic for a hypothesis test of a population proportion is the z-value.

Accepted Answer

A) True 
 B)False

Question 3

If a null hypothesis is rejected at the 0.025 level of significance,then it must also be rejected at the 0.01 level.

Accepted Answer

A) True 
 B)False

Question 4

A restaurant manager claims that food servers at this restaurant make at least $15 per hour in tips.A random sample of 50 hours shows the mean amount of tips to be $12 per hour with standard deviation $0.75 per hour.What is the value of the test statistic that can be used to determine if there is convincing evidence that the mean amount of tips made per hour is less than the manager claimed?

Accepted Answer

A) t = -7.165 
B) t = -0.566 
C) t = 9.172 
D) t = -0.08 
A) t = -7.165 
B) t = -0.566 
C) t = 9.172 
D) t = -0.08

Question 5

What type of test is used to determine if the population mean is equal to a hypothesized value?

Accepted Answer

A) t test 
B) z test 
C) F test 
D) Chi-squared test 
A) t test 
B) z test 
C) F test 
D) Chi-squared test

Question 6

The value set for   is known as the

Accepted Answer

A) rejection level. 
B) acceptance level. 
C) significance level. 
D) type II error in the hypothesis test. 
A) rejection level. 
B) acceptance level. 
C) significance level. 
D) type II error in the hypothesis test.

Question 7

The burden of proof is traditionally on the null hypothesis.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following values is not typically used for   ?

Accepted Answer

A) 0.01 
B) 0.05 
C) 0.10 
D) 0.50 
A) 0.01 
B) 0.05 
C) 0.10 
D) 0.50

Question 9

A Type I error probability is represented by   ; it is the probability of incorrectly rejecting a null hypothesis that is true.

Accepted Answer

A) True 
 B)False

Question 10

A test for a population mean has _____ degrees of freedom.

Accepted Answer

A) n + 1 
B) n - 1 
C) n 
D) n - 2 
A) n + 1 
B) n - 1 
C) n 
D) n - 2

Question 11

The alternative hypothesis,or research hypothesis,is the hypothesis that the analyst is attempting to prove.

Accepted Answer

A) True 
 B)False

Question 12

The significance level   also determines the rejection region.

Accepted Answer

A) True 
 B)False

Question 13

The null hypothesis always contains a statement of equality,like "equal to","less than or equal to",or "greater than or equal to".

Accepted Answer

A) True 
 B)False

Question 14

A professor of statistics doubts the claim that the proportion of Republican voters in Michigan is at most 45%.To test the claim,the hypotheses:   ,   ,should be used.

Accepted Answer

A) True 
 B)False

Question 15

A null hypothesis is a statement about the value of a population parameter.It is usually the current thinking,or "status quo".

Accepted Answer

A) True 
 B)False

Question 16

Of type I and type II error,which is more serious?

Accepted Answer

A) Type I is considered to be more serious. 
B) Type II is considered to be more serious. 
C) Type I and Type II are equally serious. 
D) The situation determines which error is more serious.Sometimes type I errors are more serious and sometimes type II errors are more serious. 
A) Type I is considered to be more serious. 
B) Type II is considered to be more serious. 
C) Type I and Type II are equally serious. 
D) The situation determines which error is more serious.Sometimes type I errors are more serious and sometimes type II errors are more serious.

Question 17

Which pair of tests is used to test for normality?

Accepted Answer

A) A t-test and an ANOVA test 
B) An empirical cumulative distribution function test and an F-test 
C) A chi-square test and a Lilliefors test 
D) A quantile-quantile plot and a p-value test 
A) A t-test and an ANOVA test 
B) An empirical cumulative distribution function test and an F-test 
C) A chi-square test and a Lilliefors test 
D) A quantile-quantile plot and a p-value test

Question 18

The probability of making a Type I error and the level of significance   are the same.

Accepted Answer

A) True 
 B)False

Question 19

What is the idea behind the chi-square test for independence?

Accepted Answer

A) To compare the quantile-quantile (Q-Q)plot with what would be expected under independence 
B) To compare the actual counts in a contingency table with what would be expected under independence 
C) To compare the cumulative distribution with what would be expected under independence 
D) To compare the normal distribution with a chi-squared distribution 
A) To compare the quantile-quantile (Q-Q)plot with what would be expected under independence 
B) To compare the actual counts in a contingency table with what would be expected under independence 
C) To compare the cumulative distribution with what would be expected under independence 
D) To compare the normal distribution with a chi-squared distribution

Question 20

Sample evidence is statistically significant at the   level only if the p-value is larger than   .

Accepted Answer

A) True 
 B)False

A test with a 0.05 significance level has a larger rejection region than a test with a 0.01 significance level.

The test statistic for a hypothesis test of a population proportion is the z-value.

If a null hypothesis is rejected at the 0.025 level of significance,then it must also be rejected at the 0.01 level.

What type of test is used to determine if the population mean is equal to a hypothesized value?

The value set for is known as the

The burden of proof is traditionally on the null hypothesis.

Which of the following values is not typically used for ?

A Type I error probability is represented by ; it is the probability of incorrectly rejecting a null hypothesis that is true.

A test for a population mean has _____ degrees of freedom.

The alternative hypothesis,or research hypothesis,is the hypothesis that the analyst is attempting to prove.

The significance level also determines the rejection region.

The null hypothesis always contains a statement of equality,like "equal to","less than or equal to",or "greater than or equal to".

A professor of statistics doubts the claim that the proportion of Republican voters in Michigan is at most 45%.To test the claim,the hypotheses: , ,should be used.

A null hypothesis is a statement about the value of a population parameter.It is usually the current thinking,or "status quo".

Of type I and type II error,which is more serious?

Which pair of tests is used to test for normality?

The probability of making a Type I error and the level of significance are the same.

What is the idea behind the chi-square test for independence?

Sample evidence is statistically significant at the level only if the p-value is larger than .

Introduction to Business Analytics

Describing the Distribution of a Variable

Finding Relationships Among Variables

Business Intelligence Bifor Data Analysis

Probability and Probability Distributions

Decision Making Under Uncertainty

Sampling and Sampling Distributions

Confidence Interval Estimation

Regression Analysis: Estimating Relationships

Regression Analysis: Statistical Inference

Time Series Analysis and Forecasting

Introduction to Optimization Modeling

Optimization Models

Introduction to Simulation Modeling

Simulation Models

Data Mining

Analysis of Variance and Experimental Design

Statistical Process Control

Filters

Exam 9: Hypothesis Testing

A test with a 0.05 significance level has a larger rejection region than a test with a 0.01 significance level.

The test statistic for a hypothesis test of a population proportion is the z-value.

If a null hypothesis is rejected at the 0.025 level of significance,then it must also be rejected at the 0.01 level.

What type of test is used to determine if the population mean is equal to a hypothesized value?

The value set for is known as the

The burden of proof is traditionally on the null hypothesis.

Which of the following values is not typically used for ?

A Type I error probability is represented by ; it is the probability of incorrectly rejecting a null hypothesis that is true.

A test for a population mean has _____ degrees of freedom.

The alternative hypothesis,or research hypothesis,is the hypothesis that the analyst is attempting to prove.

The significance level also determines the rejection region.

The null hypothesis always contains a statement of equality,like "equal to","less than or equal to",or "greater than or equal to".

A professor of statistics doubts the claim that the proportion of Republican voters in Michigan is at most 45%.To test the claim,the hypotheses: , ,should be used.

A null hypothesis is a statement about the value of a population parameter.It is usually the current thinking,or "status quo".

Of type I and type II error,which is more serious?

Which pair of tests is used to test for normality?

The probability of making a Type I error and the level of significance are the same.

What is the idea behind the chi-square test for independence?

Sample evidence is statistically significant at the level only if the p-value is larger than .

Introduction to Business Analytics

Describing the Distribution of a Variable

Finding Relationships Among Variables

Business Intelligence Bifor Data Analysis

Probability and Probability Distributions

Decision Making Under Uncertainty

Sampling and Sampling Distributions

Confidence Interval Estimation

Regression Analysis: Estimating Relationships

Regression Analysis: Statistical Inference

Time Series Analysis and Forecasting

Introduction to Optimization Modeling

Optimization Models

Introduction to Simulation Modeling

Simulation Models

Data Mining

Analysis of Variance and Experimental Design

Statistical Process Control

Filters