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1. For a population with a mean of µ= 70, a score of X =64 corresponds to z = 21.50. What is the population standard deviation?
2. In a population distribution, a score of X =28 cor- responds to z = 21.00 and a score of X =34 cor- responds to z = 20.50. Find the mean and standard deviation for the population.
(Hint: Sketch the distri- bution and locate the two scores on your sketch.)
11% of all books sold are romance genre. If the bookstore sells 316 books on a given day, what is the probability that fewer than 40 are romances, at least 25 are romances, between 25 and 40 are romances?
A cyclist traveled at a rate of 32 mph to visit a nearby town. The cyclist averaged 10 mph on the return trip. If the round trip took 6.3 hours, find the distance to the nearby town.
The diameters of grapefruits in certain orchard are normally distributed with mean of 6.95 inches and a standard deviation of 0.75 inches. Show all work.
Bench Inc., an equipment manufacturer, leased a machine to Unicycle Company on January 1, 2014. The lease is for a 6-year period and requires equal annual payments of $41,747 at the beginning of each year.
An insurance company states that 90% of its claims are settled within 5 weeks. A consumer group selected a random sample of 100 of the company's claims and found 75 of the claims were settled within 5 weeks.
Compute Pearson's correlation coefficient between age and amount spent on this particular product.
The company can either settle out of court for $250,000 or go to court. If the company goes to court and loses, it must pay $825,000 plus $175,000 in court costs. If it wins in court the plaintiffs pay the court costs. Identify the states of natur..
Flu cases this past season in the Oshkosh school system were about 15 per week. For the entire state, the weekly average is 16 and the standard deviation, 2.35.
Fast Service, a chain of automotive tune-up shops, advertises that its personnel can change the oil, replace the oil filter, and lubricate any standard automobile in 15 minutes, on the average.
Determine the probability that subscriber didn't rent the car during past 12 months for either business or personal reasons?
a company that manufactures video cameras produces a basic model and a deluxe model. over the past year 47 of the
Critically discuss the purpose of developing a frequency distribution? What is the relationship between the relative frequency and the cumulative frequency? Could a frequency distribution contain qualitative data? Why?
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