Questions from Business Statistics

Q: Suppose the average speeds of passenger trains traveling from Newark, New

Suppose the average speeds of passenger trains traveling from Newark, New Jersey, to Philadelphia, Pennsylvania, are normally distributed, with a mean average speed of 88 miles per hour and a standard...

Q: According to the U.S. Department of Labor, the

According to the U.S. Department of Labor, the average American household spends $762 on personal care products and services per year. Suppose annual expenditures on P (410 ≤ x ≤ 825) = .636456 − .213...

Q: What is the first big change that American drivers made when gas

What is the first big change that American drivers made when gas prices significantly increased? According to an Access America survey, 30% said that it was cutting recreational driving. However, 27%...

Q: The Conference Board published information on why companies expect to increase the

The Conference Board published information on why companies expect to increase the number of part-time jobs and reduce full-time positions. Eighty-one percent of the companies said the reason was to g...

Q: According to the U.S. Bureau of the Census,

According to the U.S. Bureau of the Census, about 75% of commuters in the United States drive to work alone. Suppose 150 U.S. commuters are randomly sampled. a) What is the probability that fewer than...

Q: According to figures released by the National Agricultural Statistics Service of the

According to figures released by the National Agricultural Statistics Service of the U.S. Department of Agriculture, the U.S. production of wheat over the past 20 years has been approximately uniforml...

Q: The Federal Reserve System publishes data on family income based on its

The Federal Reserve System publishes data on family income based on its Survey of Consumer Finances. When the head of the household has a college degree, the mean before- tax family income is $85,200....

Q: According to the Polk Company, a survey of households using the

According to the Polk Company, a survey of households using the Internet when buying or leasing cars reported that 81% were seeking information about prices. In addition, 44% were seeking information...

Q: Coastal businesses along the Gulf of Mexico from Texas to Florida worry

Coastal businesses along the Gulf of Mexico from Texas to Florida worry about the threat of hurricanes during the season from June through October. Businesses become especially nervous when hurricanes...

Q: With the growing emphasis on technology and the changing business environment,

With the growing emphasis on technology and the changing business environment, many workers are discovering that training such as reeducation, skill development, and personal growth is of great assist...