Questions from Business Statistics

Q: Data are uniformly distributed between the values of 6 and 14.

Data are uniformly distributed between the values of 6 and 14. Determine the value of f(x). What are the mean and standard deviation of this distribution? What is the probability of randomly selecting...

Q: Assume a normal distribution and find the following probabilities. a

Assume a normal distribution and find the following probabilities. a) P (x < 21|μ = 25 and σ = 4) b) P(x ≥ 77|μ = 50 and σ = 9) c) P(x > 47|μ = 50 and σ = 6) d) P(13 < x < 29|μ = 23 and σ = 4) e) P(x...

Q: Work the following binomial distribution problems by using the normal distribution.

Work the following binomial distribution problems by using the normal distribution. Check your answers by using Table A.2 to solve for the probabilities. a) P(x = 12|n = 25 and p = .60) b) P(x > 5|n =...

Q: Find the probabilities for the following exponential distribution problems. a

Find the probabilities for the following exponential distribution problems. a) P(x ≥ 3|λ = 1.3) b) P (x < 2|λ = 2.0) c) P(1 ≤ x ≤ 3|λ = 1.65) d) P(x > 2|λ = .405)

Q: The U.S. Bureau of Labor Statistics reports that of

The U.S. Bureau of Labor Statistics reports that of persons who usually work full-time, the average number of hours worked per week is 43.4. Assume that the number of hours worked per week for those w...

Q: A U.S. Bureau of Labor Statistics survey showed that

A U.S. Bureau of Labor Statistics survey showed that one in five people 16 years of age or older volunteers some of his or her time. If this figure holds for the entire population and if a random samp...

Q: The average fill volume of a regular can of soft drink is

The average fill volume of a regular can of soft drink is 12 ounces. Suppose the fill volume of these cans ranges from 11.97 to 12.03 ounces and is uniformly distributed. What is the height of this di...

Q: An entrepreneur opened a small hardware store in a strip mall.

An entrepreneur opened a small hardware store in a strip mall. During the first few weeks, business was slow, with the store averaging only one customer every 20 minutes in the morning. Assume that th...

Q: Fill in the Blanks:21. The central limit theorem

21. The central limit theorem states that if n is large enough, the sample means are ______________ distributed regardless of the shape of the population. 22. According to the central limit theorem...

Q: Fill in the Blanks:11. Whenever the proportions of

11. Whenever the proportions of the strata in the sample are different than the proportions of the strata in the population, _______________ _______________ random sampling occurs. 12. With _______...