After a series of major corporations admitted to large accounting irregularities, a public policy research institute conducts a survey to determine whether the public favors increased governmental regulation and oversight of corporations. Which of the following questions will deliver an unbiased response? In light of the recent wave of shocking corporate accounting fraud, should government increase its regulation and oversight of corporations? Should privately-owned companies be subjected to intrusive governmental regulation and oversight? Is the government doing enough to protect American shareholders from corporate greed? None of the above. 10.In a move to improve relations with employees, the human resource manager of a company with multiple departments (marketing, information technology, accounting, etc.) wants to send surveys out to 50 employees. The surveys contain questions about employees’ job satisfaction. In order to get the most representative responses, to whom should the manager send the surveys? To 50 employees in a randomly selected department. To 50 employees selected by an election to represent the workforce. To 50 employees selected randomly by drawing their names from a pool of all employees. To the 50 most recent hires. 11. GMAT scores are reported to be distributed normally, with a mean of around 520. Approximately ninety-five percent of all test-takers’ scores will fall: Within 1 standard deviation of the mean. Within 2 standard deviations of the mean. Within 3 standard deviations of the mean. Above the mean. 12 In a finance class, the midterm exam’s scores were distributed approximately normally, with mean 13 (out of 20), and standard deviation 4. Approximately what proportion of the test takers scored no higher than 17? 16%. 32%. 68%. 84%. 13. Which of the following is not true about the Normal Distribution? It is completely described by its mean and its standard deviation. Its median is equal to its mode. Its median is equal to its mean. The range of possible outcomes is finite. 15. A nutrition researcher wants to determine the mean fat content of hen’s eggs. She collects a sample of 40 eggs. She calculates a mean fat content of 23 grams, with a sample standard deviation of 8 grams. What is the 95% confidence interval for this sample? [22.6 grams; 23.4 grams]. [7.0 grams; 39.0 grams]. [20.5 grams; 25.5 grams]. [19.7 grams; 26.3 grams]. 16. A market researcher plans to sample sales receipts at a natural food store to estimate the average size (in dollars) of a customer purchase. Previous analysis suggests that the standard deviation of the purchase amount is approximately $25. In order to calculate a 95% confidence interval of total width less than $5, how many sales records should the researcher include in her sample? 97. 271. 385. The answer can not be determined from the information provided. 17. When calculating a confidence interval for a mean, which of the following measures will reduce the width of the confidence interval? Source Increasing the confidence level. Decreasing the sample size. Increasing the sample size. None of the above. 18. In a sample of 6 software developers, the mean length of the work week is 60 hours, with standard deviation 5 hours. What is the 95% confidence interval for the average work week in the software development trade?

11 May After a series of major corporations admitted to large accounting irregularities, a public policy research institute conducts a survey to determine whether the public favors increased governmental regulation and oversight of corporations. Which of the following questions will deliver an unbiased response? In light of the recent wave of shocking corporate accounting fraud, should government increase its regulation and oversight of corporations? Should privately-owned companies be subjected to intrusive governmental regulation and oversight? Is the government doing enough to protect American shareholders from corporate greed? None of the above. 10.In a move to improve relations with employees, the human resource manager of a company with multiple departments (marketing, information technology, accounting, etc.) wants to send surveys out to 50 employees. The surveys contain questions about employees’ job satisfaction. In order to get the most representative responses, to whom should the manager send the surveys? To 50 employees in a randomly selected department. To 50 employees selected by an election to represent the workforce. To 50 employees selected randomly by drawing their names from a pool of all employees. To the 50 most recent hires. 11. GMAT scores are reported to be distributed normally, with a mean of around 520. Approximately ninety-five percent of all test-takers’ scores will fall: Within 1 standard deviation of the mean. Within 2 standard deviations of the mean. Within 3 standard deviations of the mean. Above the mean. 12 In a finance class, the midterm exam’s scores were distributed approximately normally, with mean 13 (out of 20), and standard deviation 4. Approximately what proportion of the test takers scored no higher than 17? 16%. 32%. 68%. 84%. 13. Which of the following is not true about the Normal Distribution? It is completely described by its mean and its standard deviation. Its median is equal to its mode. Its median is equal to its mean. The range of possible outcomes is finite. 15. A nutrition researcher wants to determine the mean fat content of hen’s eggs. She collects a sample of 40 eggs. She calculates a mean fat content of 23 grams, with a sample standard deviation of 8 grams. What is the 95% confidence interval for this sample? [22.6 grams; 23.4 grams]. [7.0 grams; 39.0 grams]. [20.5 grams; 25.5 grams]. [19.7 grams; 26.3 grams]. 16. A market researcher plans to sample sales receipts at a natural food store to estimate the average size (in dollars) of a customer purchase. Previous analysis suggests that the standard deviation of the purchase amount is approximately $25. In order to calculate a 95% confidence interval of total width less than $5, how many sales records should the researcher include in her sample? 97. 271. 385. The answer can not be determined from the information provided. 17. When calculating a confidence interval for a mean, which of the following measures will reduce the width of the confidence interval? Source Increasing the confidence level. Decreasing the sample size. Increasing the sample size. None of the above. 18. In a sample of 6 software developers, the mean length of the work week is 60 hours, with standard deviation 5 hours. What is the 95% confidence interval for the average work week in the software development trade?

 

counting irregularities, a public policy research institute conducts a survey to determine whether the public favors increased governmental regulation and oversight of corporations.

Which of the following questions will deliver an unbiased response?

 

 

• In light of the recent wave of shocking corporate accounting fraud, should government increase its regulation and oversight of corporations?
•  
• Should privately-owned companies be subjected to intrusive governmental regulation and oversight?
•  
• Is the government doing enough to protect American shareholders from corporate greed?
•  
• None of the above.
•  

 

10.In a move to improve relations with employees, the human resource manager of a company with multiple departments (marketing, information technology, accounting, etc.) wants to send surveys out to 50 employees. The surveys contain questions about employees’ job satisfaction.

In order to get the most representative responses, to whom should the manager send the surveys?

 

 

• To 50 employees in a randomly selected department.
• To 50 employees selected by an election to represent the workforce.
• To 50 employees selected randomly by drawing their names from a pool of all employees.
• To the 50 most recent hires.
•  

 

11.

 

GMAT scores are reported to be distributed normally, with a mean of around 520.

Approximately ninety-five percent of all test-takers’ scores will fall:

 

• Within 1 standard deviation of the mean.
• Within 2 standard deviations of the mean.
• Within 3 standard deviations of the mean.
• Above the mean.
•  

 

12

 

In a finance class, the midterm exam’s scores were distributed approximately normally, with mean 13 (out of 20), and standard deviation 4.

Approximately what proportion of the test takers scored no higher than 17?

 

• 16%.
• 32%.
• 68%.
• 84%.
•  

 

13.

 

Which of the following is not true about the Normal Distribution?

 

• It is completely described by its mean and its standard deviation.
• Its median is equal to its mode.
• Its median is equal to its mean.
• The range of possible outcomes is finite.
•  

 

15.

 

A nutrition researcher wants to determine the mean fat content of hen’s eggs. She collects a sample of 40 eggs. She calculates a mean fat content of 23 grams, with a sample standard deviation of 8 grams.

What is the 95% confidence interval for this sample?

 

• [22.6 grams; 23.4 grams].
• [7.0 grams; 39.0 grams].
• [20.5 grams; 25.5 grams].
• [19.7 grams; 26.3 grams].

 

16.

 

A market researcher plans to sample sales receipts at a natural food store to estimate the average size (in dollars) of a customer purchase. Previous analysis suggests that the standard deviation of the purchase amount is approximately $25.

In order to calculate a 95% confidence interval of total width less than $5, how many sales records should the researcher include in her sample?

 

• 
  97.
• 271.
• 385.
• The answer can not be determined from the information provided.

 

17.
When calculating a confidence interval for a mean, which of the following measures will reduce the width of the confidence interval? Source

 

• Increasing the confidence level.
• Decreasing the sample size.
• Increasing the sample size.
• None of the above.
•  

 

18.

 

In a sample of 6 software developers, the mean length of the work week is 60 hours, with standard deviation 5 hours.

What is the 95% confidence interval for the average work week in the software development trade?