Suppose we want to test H0 : μ ≥ 30 versus H1 : μ 0 in favor of H1?

A) = 28,s = 6 B) = 27,s = 4 C) = 32,s = 2 D) = 26,s = 9 A) = 28,s = 6 B) = 27,s = 4 C) = 32,s = 2 D) = 26,s = 9

Exam 9: Introduction to Hypothesis Testing

In testing a hypothesis,statements for the null and alternative hypotheses as well as the selection of the level of significance should precede the collection and examination of the data.

(True/False)

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Question 81

The R.D.Wilson Company makes a soft drink dispensing machine that allows customers to get soft drinks from the machine in a cup with ice.When the machine is running properly,the average number of fluid ounces in the cup should be 14.Periodically the machines need to be tested to make sure that they have not gone out of adjustment.To do this,six cups are filled by the machine and a technician carefully measures the volume in each cup.In one such test,the following data were observed: Which of the following would be the correct null hypothesis if the company wishes to test the machine?

(Multiple Choice)

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Question 82

In a two-tailed hypothesis test for a population mean,an increase in the sample size will:

(Multiple Choice)

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Question 83

If a hypothesis test is conducted for a population mean,a null and alternative hypothesis of the form: will result in a one-tailed hypothesis test since the sample result can fall in only one tail.

(True/False)

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Question 84

If the Type I error (α)for a given test is to be decreased,then for a fixed sample size n:

(Multiple Choice)

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Question 85

An article in an operations management journal recently stated that a formal hypothesis test rejected the hypothesis that mean employee productivity was less than $45.70 per hour in the wood processing industry.Given this conclusion,it is possible that a Type I statistical error was committed.

(True/False)

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Question 86

A consumer group plans to test whether a new passenger car that is advertised to have a mean highway miles per gallon of at least 33 actually meets this level.They plan to test the hypothesis using a significance level of 0.05 and a sample size of n = 100 cars.It is believed that the population standard deviation is 3 mpg.Based upon this information,what is the critical value in terms of miles per gallon that would be needed prior to finding beta?

(Multiple Choice)

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Question 87

The power of a test is measured by its capability of:

(Multiple Choice)

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Question 88

In a one-tailed hypothesis test,the larger the significance level,the greater the critical value will be.

(True/False)

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Question 89

When using the p-value method,the null hypothesis is rejected when p > α.

(True/False)

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Question 90

A local medical center has advertised that the mean wait for services will be less than 15 minutes.In an effort to test whether this claim can be substantiated,a random sample of 100 customers was selected and their wait times were recorded.The mean wait time was 17.0 minutes.Based on this sample result,there is sufficient evidence to reject the medical center's claim.

(True/False)

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Question 91

A house cleaning service claims that it can clean a four bedroom house in less than 2 hours.A sample of n = 16 houses is taken and the sample mean is found to be 1.97 hours and the sample standard deviation is found to be 0.1 hours.Using a 0.05 level of significance the correct conclusion is

(Multiple Choice)

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Question 92

If a decision maker wishes to reduce the chance of making a Type II error,one option is to increase the sample size.

(True/False)

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Question 93

The loan manager for State Bank and Trust has claimed that the mean loan balance on outstanding loans at the bank is over $14,500.To test this at a significance level of 0.05,a random sample of n = 100 loan accounts is selected.Assuming that the population standard deviation is known to be $3,000,the null and alternative hypotheses to be tested are: .

(True/False)

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Question 94

Suppose we want to test H₀: μ ≥ 30 versus H₁: μ < 30.Which of the following possible sample results based on a sample of size 36 gives the strongest evidence to reject H₀ in favor of H₁?

(Multiple Choice)

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Question 95

When a battery company claims that their batteries last longer than 100 hours and a consumer group wants to test this claim,the hypotheses should be:

(True/False)

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Question 96

A concern of Major League Baseball is that games last too long.Some executives in the league's headquarters believe that the mean length of games this past year exceeded 3 hours (180 minutes).To test this,the league selected a random sample of 80 games and found the following results: = 193 minutes and s = 16 minutes. Based on these results,if the null hypothesis is tested using an alpha level equal to 0.10,which of the following is true?

(Multiple Choice)

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Question 97

The null and alternate hypotheses must be opposites of each other.

(True/False)

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Question 98

When someone is on trial for suspicion of committing a crime,the hypotheses are: Which of the following is correct?

(Multiple Choice)

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Question 99

After completing sales training for a large company,it is expected that the salesperson will generate a sale on at least 15 percent of the calls he or she makes.To make sure that the sales training process is working,a random sample of n = 400 sales calls made by sales representatives who have completed the training have been selected and the null hypothesis is to be tested at 0.05 alpha level.Suppose that a sale is made on 36 of the calls.Based on this information,what is the test statistic for this test?

(Multiple Choice)

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Question 100

Showing 81 - 100 of 129

In testing a hypothesis,statements for the null and alternative hypotheses as well as the selection of the level of significance should precede the collection and examination of the data.

In a two-tailed hypothesis test for a population mean,an increase in the sample size will:

If a hypothesis test is conducted for a population mean,a null and alternative hypothesis of the form: will result in a one-tailed hypothesis test since the sample result can fall in only one tail.

If the Type I error (α)for a given test is to be decreased,then for a fixed sample size n:

An article in an operations management journal recently stated that a formal hypothesis test rejected the hypothesis that mean employee productivity was less than $45.70 per hour in the wood processing industry.Given this conclusion,it is possible that a Type I statistical error was committed.

The power of a test is measured by its capability of:

In a one-tailed hypothesis test,the larger the significance level,the greater the critical value will be.

When using the p-value method,the null hypothesis is rejected when p > α.

A house cleaning service claims that it can clean a four bedroom house in less than 2 hours.A sample of n = 16 houses is taken and the sample mean is found to be 1.97 hours and the sample standard deviation is found to be 0.1 hours.Using a 0.05 level of significance the correct conclusion is

If a decision maker wishes to reduce the chance of making a Type II error,one option is to increase the sample size.

Suppose we want to test H₀: μ ≥ 30 versus H₁: μ < 30.Which of the following possible sample results based on a sample of size 36 gives the strongest evidence to reject H₀ in favor of H₁?

When a battery company claims that their batteries last longer than 100 hours and a consumer group wants to test this claim,the hypotheses should be:

The null and alternate hypotheses must be opposites of each other.

When someone is on trial for suspicion of committing a crime,the hypotheses are: Which of the following is correct?

The Where, why, and How of Data Collection

Graphs,charts and Tablesdescribing Your Data

Describing Data Using Numerical Measures

Using Probability and Probability Distributions

Discrete Probability Distributions

Introduction to Continuous Probability Distributions

Introduction to Sampling Distributions

Estimating Single Population Parameters

Estimation and Hypothesis Testing for Two Population Parameters

Hypothesis Tests and Estimation for Population Variances

Analysis of Variance

Goodness-Of-Fit Tests and Contingency Analysis

Introduction to Linear Regression and Correlation Analysis

Multiple Regression Analysis and Model Building

Analyzing and Forecasting Time-Series Data

Introduction to Nonparametric Statistics

Introduction to Quality and Statistical Process Control

Introduction to Decision Analysis

Filters

Exam 9: Introduction to Hypothesis Testing

In testing a hypothesis,statements for the null and alternative hypotheses as well as the selection of the level of significance should precede the collection and examination of the data.

In a two-tailed hypothesis test for a population mean,an increase in the sample size will:

If a hypothesis test is conducted for a population mean,a null and alternative hypothesis of the form: will result in a one-tailed hypothesis test since the sample result can fall in only one tail.

If the Type I error (α)for a given test is to be decreased,then for a fixed sample size n:

An article in an operations management journal recently stated that a formal hypothesis test rejected the hypothesis that mean employee productivity was less than $45.70 per hour in the wood processing industry.Given this conclusion,it is possible that a Type I statistical error was committed.

The power of a test is measured by its capability of:

In a one-tailed hypothesis test,the larger the significance level,the greater the critical value will be.

When using the p-value method,the null hypothesis is rejected when p > α.

A house cleaning service claims that it can clean a four bedroom house in less than 2 hours.A sample of n = 16 houses is taken and the sample mean is found to be 1.97 hours and the sample standard deviation is found to be 0.1 hours.Using a 0.05 level of significance the correct conclusion is

If a decision maker wishes to reduce the chance of making a Type II error,one option is to increase the sample size.

Suppose we want to test H0 : μ ≥ 30 versus H1 : μ < 30.Which of the following possible sample results based on a sample of size 36 gives the strongest evidence to reject H0 in favor of H1?

When a battery company claims that their batteries last longer than 100 hours and a consumer group wants to test this claim,the hypotheses should be:

The null and alternate hypotheses must be opposites of each other.

When someone is on trial for suspicion of committing a crime,the hypotheses are: Which of the following is correct?

The Where, why, and How of Data Collection

Graphs,charts and Tablesdescribing Your Data

Describing Data Using Numerical Measures

Using Probability and Probability Distributions

Discrete Probability Distributions

Introduction to Continuous Probability Distributions

Introduction to Sampling Distributions

Estimating Single Population Parameters

Estimation and Hypothesis Testing for Two Population Parameters

Hypothesis Tests and Estimation for Population Variances

Analysis of Variance

Goodness-Of-Fit Tests and Contingency Analysis

Introduction to Linear Regression and Correlation Analysis

Multiple Regression Analysis and Model Building

Analyzing and Forecasting Time-Series Data

Introduction to Nonparametric Statistics

Introduction to Quality and Statistical Process Control

Introduction to Decision Analysis

Filters

Suppose we want to test H₀: μ ≥ 30 versus H₁: μ < 30.Which of the following possible sample results based on a sample of size 36 gives the strongest evidence to reject H₀ in favor of H₁?