Questions from Business Statistics

Q: Companies use employee training for various reasons, including employee loyalty,

Companies use employee training for various reasons, including employee loyalty, certification, quality, and process improvement. In a national survey of companies, BI Learning Systems reported that 5...

Q: In a U.S. consumer payment study published by TSYS

In a U.S. consumer payment study published by TSYS, respondents were asked which payment type feels safest for online purchases. Credit card was selected as safest by 42% of the respondents. None of t...

Q: In a study of incentives used by companies to retain mature workers

In a study of incentives used by companies to retain mature workers by The Conference Board, it was reported that 41% use flexible work arrangements. Suppose that of those companies that do not use fl...

Q: A small independent physicians’ practice has three doctors. Dr. Sarabia

A small independent physicians’ practice has three doctors. Dr. Sarabia sees 41% of the patients, Dr. Tran sees 32%, and Dr. Jackson sees the rest. Dr. Sarabia requests blood tests on 5% of her patien...

Q: A survey by the Arthur Andersen Enterprise Group/National Small Business

A survey by the Arthur Andersen Enterprise Group/National Small Business United attempted to determine what the leading challenges are for the growth and survival of small businesses. Although the eco...

Q: According to U.S. Census Bureau figures, 34.

According to U.S. Census Bureau figures, 34.0% of all Americans are in the 0–24 age bracket, 13.3% are in the 25–34 age bracket, 13.3% are in the 35–44 age bracket, and 39.4% are in the 45 and older a...

Q: A retail study by Deloitte revealed that 54% of adults surveyed

A retail study by Deloitte revealed that 54% of adults surveyed believed that plastic, Non-compostable shopping bags should be banned. Suppose 41% of adults regularly recycle aluminum cans and believe...

Q: A supplier shipped a lot of six parts to a company.

A supplier shipped a lot of six parts to a company. The lot contained three defective parts. Suppose the customer decided to randomly select two parts and test them for defects. How large a sample spa...

Q: A data set contains the following seven values. /

A data set contains the following seven values. a) Find the range. b) Find the population variance. c) Find the population standard deviation. d) Find the interquartile range. e) Find the z score for...

Q: Given A = {1, 3, 5, 7,

Given A = {1, 3, 5, 7, 8, 9}, B = {2, 4, 7, 9}, and C = {1, 2, 3, 4, 7}, solve the following. a) A ∪ C = ___________________ b) A ∩ B = ___________________ c) A ∩ C = ___________________ d) A ∪ B ∪ C...