Questions from Business Statistics

Q: Values are uniformly distributed between 200 and 240. a)

Values are uniformly distributed between 200 and 240. a) What is the value of f(x) for this distribution? b) Determine the mean and standard deviation of this distribution. c) Probability of (x > 230)...

Q: Toolworkers are subject to work-related injuries. One disorder,

Toolworkers are subject to work-related injuries. One disorder, caused by strains to the hands and wrists, is called carpal tunnel syndrome. It strikes as many as 23,000 workers per year. The U.S. Lab...

Q: Suppose you are working with a data set that is normally distributed

Suppose you are working with a data set that is normally distributed, with a mean of 200 and a standard deviation of 47. Determine the value of x from the following information. a) 60% of the values a...

Q: Suppose the annual employer 401(k) cost per participant is

Suppose the annual employer 401(k) cost per participant is normally distributed with a standard deviation of $625, but the mean is unknown. a) If 73.89% of such costs are greater than $1,700, what is...

Q: Based on annual driving of 15,000 miles and fuel efficiency

Based on annual driving of 15,000 miles and fuel efficiency of 20 mpg, a car in the United States uses, on average, 750 gallons of gasoline per year. If annual automobile fuel usage is normally distri...

Q: Solve for the mean and standard deviation of the following binomial distributions

Solve for the mean and standard deviation of the following binomial distributions. a) n = 20 and p = .70 b) n = 70 and p = .35 c) n = 100 and p = .50

Q: The U.S. national average door-to-doctor

The U.S. national average door-to-doctor wait time for patients to see a doctor is now 21.3 minutes. Suppose such wait times are normally distributed with a standard deviation of 6.7 minutes. Some pat...

Q: Suppose commute times in a large city are normally distributed and that

Suppose commute times in a large city are normally distributed and that 62.5% of commuters in this city take more than 21 minutes to commute one way. If the standard deviation of such commutes is 6.2...

Q: According to one source, the average cumulated college student loan debt

According to one source, the average cumulated college student loan debt for a graduating senior is $29,400. Assume that such debt is normally distributed and that the standard deviation is $5,684. Th...

Q: Convert the following binomial distribution problems to normal distribution problems.

Convert the following binomial distribution problems to normal distribution problems. Use the correction for continuity. a) P(x ≤ 16|n = 30 and p = .70) b) P(10 < x ≤ 20) |n = 25 and p = .50) c) P(x =...