Question 1

When the p-value is used for hypothesis testing, the null hypothesis is rejected if

Accepted Answer

A)  p-value  $\lt$?. 
B)  ?  $\lt$ p-value. 
C)  p-value=1-$\alpha$/2 
D)  p-value =1-$\alpha$ 
A)  p-value  $\lt$?. 
B)  ?  $\lt$ p-value. 
C)  p-value=1-$\alpha$/2 
D)  p-value =1-$\alpha$

Question 2

A school's newspaper reported that the proportion of students majoring in business is at least 30%. You plan on taking a sample to test the newspaper's claim. The correct set of hypotheses is

Accepted Answer

A)  H0: p a: p   .30. 
B)  H0: p   .30 Ha: p > .30. 
C)  H0: p   .30 Ha: p 0: p > .30 Ha: p   .30. 
A)  H0: p a: p   .30. 
B)  H0: p   .30 Ha: p > .30. 
C)  H0: p   .30 Ha: p 0: p > .30 Ha: p   .30.

Question 3

More evidence against H0 is indicated by​

Accepted Answer

A)  ​lower levels of significance. 
B)  ​smaller p-values. 
C)  ​smaller critical values. 
D)  lower probabilities for the power of the test. 
A)  ​lower levels of significance. 
B)  ​smaller p-values. 
C)  ​smaller critical values. 
D)  lower probabilities for the power of the test.

Question 4

A random sample of 25 students selected from the student body of a large university had an average age of 25 years and a standard deviation of 2 years. We want to determine if the average age of all the students at the university is significantly more than 24. Assume the distribution of the population of ages is normal. Using α = .05, it can be concluded that the population mean age is

Accepted Answer

A)  not significantly different from 24. 
B)  significantly different from 24. 
C)  significantly less than 24. 
D)  significantly more than 24. 
A)  not significantly different from 24. 
B)  significantly different from 24. 
C)  significantly less than 24. 
D)  significantly more than 24.

Question 5

The average monthly rent for one-bedroom apartments in Chattanooga has been $800. Because of the downturn in the real estate market, it is believed that there has been a decrease in the average rental. The correct hypotheses to be tested are

Accepted Answer

A)  H0: μ ≥ 800 Ha: μ 0: μ = 800 Ha: μ ≠ 800. 
C)  H0: μ > 800 Ha: μ ≤ 800. 
D)  H0: μ a: μ ≥ 800. 
A)  H0: μ ≥ 800 Ha: μ 0: μ = 800 Ha: μ ≠ 800. 
C)  H0: μ > 800 Ha: μ ≤ 800. 
D)  H0: μ a: μ ≥ 800.

Question 6

For a given sample size in hypothesis testing,

Accepted Answer

A)  the smaller the Type I error, the smaller the Type II error will be. 
B)  the smaller the Type I error, the larger the Type II error will be. 
C)  Type II error will not be affected by Type I error. 
D)  the sum of Type I and Type II errors must equal to 1. 
A)  the smaller the Type I error, the smaller the Type II error will be. 
B)  the smaller the Type I error, the larger the Type II error will be. 
C)  Type II error will not be affected by Type I error. 
D)  the sum of Type I and Type II errors must equal to 1.

Question 7

As a general guideline, the research hypothesis should be stated as the​

Accepted Answer

A)  ​null hypothesis. 
B)  ​alternative hypothesis. 
C)  ​tentative hypothesis. 
D)  ​hypothesis the researcher wants to disprove. 
A)  ​null hypothesis. 
B)  ​alternative hypothesis. 
C)  ​tentative hypothesis. 
D)  ​hypothesis the researcher wants to disprove.

Question 8

Read the z statistic from the normal distribution table and choose the correct answer. For a one-tailed test (upper tail) using α = .0721, z =

Accepted Answer

A)  1.54. 
B)  1.96. 
C)  1.645. 
D)  1.46. 
A)  1.54. 
B)  1.96. 
C)  1.645. 
D)  1.46.

Question 9

When the following hypotheses are being tested at a level of significance of α ​
H0: μ   500
Ha: μ < 500
​
The null hypothesis will be rejected, if the p-value is

Accepted Answer

A)    α. 
B)  > α. 
C)  = α/2. 
D)    1 - α/2. 
A)    α. 
B)  > α. 
C)  = α/2. 
D)    1 - α/2.

Question 10

In a two-tailed hypothesis test, the test statistic is determined to be z = 2.5. The p-value for this test is

Accepted Answer

A)  .9876. 
B)  .4938. 
C)  .0062. 
D)  .0124. 
A)  .9876. 
B)  .4938. 
C)  .0062. 
D)  .0124.

Question 11

The average life expectancy of tires produced by the Whitney Tire Company has been 40,000 miles. Management believes that due to a new production process, the life expectancy of their tires has increased. In order to test the validity of their belief, the correct set of hypotheses is

Accepted Answer

A) H0: μ a: μ 40,000. B) H0: μ 40,000 Ha: μ > 40,000. C) H0: μ > 40,000 Ha: μ 40,000. D) H0: μ 40,000 Ha: μ < 40,000. A) H0: μ a: μ 40,000. B) H0: μ 40,000 Ha: μ > 40,000. C) H0: μ > 40,000 Ha: μ 40,000. D) H0: μ 40,000 Ha: μ < 40,000.

Question 12

The average manufacturing work week in metropolitan Chattanooga was 40.2 hours last year. It is believed that the recession has led to a reduction in the average work week. To test the validity of this belief, the hypotheses are

Accepted Answer

A)  H0: μ a: μ ≥ 40.2. 
B)  H0: μ ≥ 40.2 Ha: μ 0: μ > 40.2 Ha: μ ≤ 40.2. 
D)  H0: μ = 40.2 Ha: μ ≠ 40.2. 
A)  H0: μ a: μ ≥ 40.2. 
B)  H0: μ ≥ 40.2 Ha: μ 0: μ > 40.2 Ha: μ ≤ 40.2. 
D)  H0: μ = 40.2 Ha: μ ≠ 40.2.

Question 13

The probability of making a Type I error is denoted by

Accepted Answer

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

Question 14

A grocery store has an average sales of $8000 per day. The store introduced several advertising campaigns in order to increase sales. To determine whether or not the advertising campaigns have been effective in increasing sales, a sample of 100 days of sales was selected. It was found that the average was $8200 per day. From past information, it is known that the standard deviation of the population is $1500. The p-value is

Accepted Answer

A)  1.3333. 
B)  .9082. 
C)  .0918. 
D)  .1333. 
A)  1.3333. 
B)  .9082. 
C)  .0918. 
D)  .1333.

Question 15

In a two-tailed hypothesis test, the area in each tail corresponding to the critical values is equal to

Accepted Answer

A)  ​α. 
B)  ​α/2. 
C)  ​2α. 
D)  ​1 - α/2. 
A)  ​α. 
B)  ​α/2. 
C)  ​2α. 
D)  ​1 - α/2.

When the p-value is used for hypothesis testing, the null hypothesis is rejected if

A school's newspaper reported that the proportion of students majoring in business is at least 30%. You plan on taking a sample to test the newspaper's claim. The correct set of hypotheses is

More evidence against H₀ is indicated by

The average monthly rent for one-bedroom apartments in Chattanooga has been $800. Because of the downturn in the real estate market, it is believed that there has been a decrease in the average rental. The correct hypotheses to be tested are

For a given sample size in hypothesis testing,

As a general guideline, the research hypothesis should be stated as the

Read the z statistic from the normal distribution table and choose the correct answer. For a one-tailed test (upper tail) using α = .0721, z =

When the following hypotheses are being tested at a level of significance of α H₀: μ 500 H_a: μ < 500 The null hypothesis will be rejected, if the p-value is

In a two-tailed hypothesis test, the test statistic is determined to be z = 2.5. The p-value for this test is

The average life expectancy of tires produced by the Whitney Tire Company has been 40,000 miles. Management believes that due to a new production process, the life expectancy of their tires has increased. In order to test the validity of their belief, the correct set of hypotheses is

The average manufacturing work week in metropolitan Chattanooga was 40.2 hours last year. It is believed that the recession has led to a reduction in the average work week. To test the validity of this belief, the hypotheses are

The probability of making a Type I error is denoted by

In a two-tailed hypothesis test, the area in each tail corresponding to the critical values is equal to

Data and Statistics

Descriptive Statistics: Tabular and Graphical Displays

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Comparing Multiple Proportions, Tests of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Regression Analysis: Model Building

Time Series Analysis and Forecasting

Nonparametric Methods

Decision Analysis

Index Numbers

Statistical Methods for Quality Control

Sample Survey

Filters

Exam 9: Hypothesis Tests

When the p-value is used for hypothesis testing, the null hypothesis is rejected if

A school's newspaper reported that the proportion of students majoring in business is at least 30%. You plan on taking a sample to test the newspaper's claim. The correct set of hypotheses is

More evidence against H0 is indicated by​

The average monthly rent for one-bedroom apartments in Chattanooga has been $800. Because of the downturn in the real estate market, it is believed that there has been a decrease in the average rental. The correct hypotheses to be tested are

For a given sample size in hypothesis testing,

As a general guideline, the research hypothesis should be stated as the​

Read the z statistic from the normal distribution table and choose the correct answer. For a one-tailed test (upper tail) using α = .0721, z =

When the following hypotheses are being tested at a level of significance of α ​ H0: μ 500 Ha: μ < 500 ​ The null hypothesis will be rejected, if the p-value is

In a two-tailed hypothesis test, the test statistic is determined to be z = 2.5. The p-value for this test is

The average life expectancy of tires produced by the Whitney Tire Company has been 40,000 miles. Management believes that due to a new production process, the life expectancy of their tires has increased. In order to test the validity of their belief, the correct set of hypotheses is

The average manufacturing work week in metropolitan Chattanooga was 40.2 hours last year. It is believed that the recession has led to a reduction in the average work week. To test the validity of this belief, the hypotheses are

The probability of making a Type I error is denoted by

In a two-tailed hypothesis test, the area in each tail corresponding to the critical values is equal to

Data and Statistics

Descriptive Statistics: Tabular and Graphical Displays

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Comparing Multiple Proportions, Tests of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Regression Analysis: Model Building

Time Series Analysis and Forecasting

Nonparametric Methods

Decision Analysis

Index Numbers

Statistical Methods for Quality Control

Sample Survey

Filters

More evidence against H₀ is indicated by

As a general guideline, the research hypothesis should be stated as the

When the following hypotheses are being tested at a level of significance of α H₀: μ 500 H_a: μ < 500 The null hypothesis will be rejected, if the p-value is