Questions from Business Statistics

Q: A hair stylist has been in business one year. Sixty percent

A hair stylist has been in business one year. Sixty percent of his customers are walk-in business. If he randomly samples eight of the people from last week’s list of customers, what is the probabilit...

Q: A Department of Transportation survey showed that 60% of U.

A Department of Transportation survey showed that 60% of U.S. residents over 65 years of age oppose use of cell phones in flight even if there were no issues with the phones interfering with aircraft...

Q: A survey conducted by the Consumer Reports National Research Center reported,

A survey conducted by the Consumer Reports National Research Center reported, among other things, that women spend an average of 1.2 hours per week shopping online. Assume that hours per week shopping...

Q: Solve the following problems by using the binomial formula. a

Solve the following problems by using the binomial formula. a) If n = 4 and p = .10, find P(x = 3). b) If n = 7 and p = .80, find P(x = 4). c) If n = 10 and p = .60, find P(x ≥ 7). d) If n = 12 and p...

Q: According to the Audit Bureau of Circulations, the top 25 city

According to the Audit Bureau of Circulations, the top 25 city newspapers in the United States ranked according to circulation are: Rank ____________________ Newspaper 1 …………..………………………… New York Time...

Q: An office in Albuquerque has 24 workers including management. Eight of

An office in Albuquerque has 24 workers including management. Eight of the workers commute to work from the west side of the Rio Grande. Suppose 6 of the office workers are randomly selected. a) What...

Q: According to the U.S. Census Bureau, 20%

According to the U.S. Census Bureau, 20% of the workers in Atlanta use public transportation. If 25 Atlanta workers are randomly selected, what is the expected number to use public transportation? Gra...

Q: One of the earliest applications of the Poisson distribution was in analyzing

One of the earliest applications of the Poisson distribution was in analyzing incoming calls to a telephone switchboard. Analysts generally believe that random phone calls are Poisson distributed. Sup...

Q: A survey by Frank N. Magid Associates revealed that 3%

A survey by Frank N. Magid Associates revealed that 3% of Americans are not connected to the Internet at home. Another researcher randomly selects 70 Americans. a) What is the expected number of these...

Q: Suppose that in the bookkeeping operation of a large corporation the probability

Suppose that in the bookkeeping operation of a large corporation the probability of a recording error on any one billing is .005. Suppose the probability of a recording error from one billing to the n...