Exam 9: Estimation From Sample Data

A survey based on a random sample of 3000 U.S.women in a Virginia Slims Poll showed that 1950 were combining marriage,career,and children.Develop a 98% confidence interval estimate of the true proportion of women in the U.S.who fit into this category. to

(Short Answer)

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Question 141

A total of 150 households were asked if they had Internet access,of which 57 responded "Yes".Which of the following would represent a 98% confidence interval around this sample proportion?

(Multiple Choice)

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Question 142

The more certain we wish to be that the interval estimate contains the population parameter,the wider the interval will have to be.

(True/False)

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Question 143

The owner of a small manufacturing firm is concerned about the high cost of health insurance for his employees.A random sample was taken from the total of 120 employees to determine whether they would support the owner's proposal for participation in a preferred-provider plan.Of the 50 employees sampled,28 strongly supported the plan.Construct a 95% confidence for the true proportion. to Do you feel that the proposed plan would get majority support from the employees if put to a vote? Explain your answer.

(Essay)

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Question 144

Determine the limits of the 90% specified confidence interval for $\pi$ ,given that n = 400; and p = 0.10. to

(Short Answer)

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Question 145

A cost accountant wished to establish the average amount, $\mu$ ,spent by executives per day on travel and lodging.Then a comparison,between the average and the amount turned in to be reimbursed,will be made and unreasonably high or low expense amounts audited.A random sample of 50 executive expense receipts is taken.The average in the sample was $208.From a similar survey the standard deviation of the amounts is approximately $\text { σ}$ = $29.The accountant prepares a 90-percent confidence level for $\mu$ .How would the auditor use these data to determine if an audit should be conducted?

(Short Answer)

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Question 146

What is a confidence coefficient?

(Essay)

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Question 147

Inferential statistics is the:

(Multiple Choice)

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Question 148

Your state is considering raising the legal age for consumption of alcoholic beverages to 21 years old.How large a sample size must be taken to make an estimate of the true proportion of citizens who favor this move.The error should be no more than 0.01 with 99% confidence.

(Multiple Choice)

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Question 149

If the population mean $\mu$ and population standard deviation $\text {? }$ are both known and a sample size that is greater than 30,one can invoke the central limit theorem and make probability statements about the means of samples taken from the population.

(True/False)

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Question 150

Showing 141 - 150 of 150

A survey based on a random sample of 3000 U.S.women in a Virginia Slims Poll showed that 1950 were combining marriage,career,and children.Develop a 98% confidence interval estimate of the true proportion of women in the U.S.who fit into this category. to

A total of 150 households were asked if they had Internet access,of which 57 responded "Yes".Which of the following would represent a 98% confidence interval around this sample proportion?

The more certain we wish to be that the interval estimate contains the population parameter,the wider the interval will have to be.

Determine the limits of the 90% specified confidence interval for $\pi$ ,given that n = 400; and p = 0.10. to

What is a confidence coefficient?

Inferential statistics is the:

Your state is considering raising the legal age for consumption of alcoholic beverages to 21 years old.How large a sample size must be taken to make an estimate of the true proportion of citizens who favor this move.The error should be no more than 0.01 with 99% confidence.

If the population mean $\mu$ and population standard deviation $\text {? }$ are both known and a sample size that is greater than 30,one can invoke the central limit theorem and make probability statements about the means of samples taken from the population.

A Preview of Business Statistics

Visual Description of Data

Statistical Description of Data

Data Collection and Sampling Methods

Probability: Review of Basic Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions

Hypothesis Tests Involving a Sample Mean or Proportion

Hypothesis Tests Involving Two Sample Means

Analysis of Variance Tests

Chi-Square Applications

Nonparametric Methods

Simple Linear Regression and Correlation

Multiple Regression and Correlation

Model Building

Models for Time Series and Forecasting

Decision Theory

Total Quality Management

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Exam 9: Estimation From Sample Data

A survey based on a random sample of 3000 U.S.women in a Virginia Slims Poll showed that 1950 were combining marriage,career,and children.Develop a 98% confidence interval estimate of the true proportion of women in the U.S.who fit into this category. ____________________ to ____________________

A total of 150 households were asked if they had Internet access,of which 57 responded "Yes".Which of the following would represent a 98% confidence interval around this sample proportion?

The more certain we wish to be that the interval estimate contains the population parameter,the wider the interval will have to be.

Determine the limits of the 90% specified confidence interval for π\piπ ,given that n = 400; and p = 0.10. ____________________ to ____________________

What is a confidence coefficient?

Inferential statistics is the:

Your state is considering raising the legal age for consumption of alcoholic beverages to 21 years old.How large a sample size must be taken to make an estimate of the true proportion of citizens who favor this move.The error should be no more than 0.01 with 99% confidence.

If the population mean μ\muμ and population standard deviation ? \text {? }? are both known and a sample size that is greater than 30,one can invoke the central limit theorem and make probability statements about the means of samples taken from the population.

A Preview of Business Statistics

Visual Description of Data

Statistical Description of Data

Data Collection and Sampling Methods

Probability: Review of Basic Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions

Hypothesis Tests Involving a Sample Mean or Proportion

Hypothesis Tests Involving Two Sample Means

Analysis of Variance Tests

Chi-Square Applications

Nonparametric Methods

Simple Linear Regression and Correlation

Multiple Regression and Correlation

Model Building

Models for Time Series and Forecasting

Decision Theory

Total Quality Management

Filters

A survey based on a random sample of 3000 U.S.women in a Virginia Slims Poll showed that 1950 were combining marriage,career,and children.Develop a 98% confidence interval estimate of the true proportion of women in the U.S.who fit into this category. to

Determine the limits of the 90% specified confidence interval for $\pi$ ,given that n = 400; and p = 0.10. to

If the population mean $\mu$ and population standard deviation $\text {? }$ are both known and a sample size that is greater than 30,one can invoke the central limit theorem and make probability statements about the means of samples taken from the population.