Questions from Applied Statistics

Q: A random sample of 21 nickels measured with a very accurate micrometer

A random sample of 21 nickels measured with a very accurate micrometer showed a mean diameter of 0.834343 inch with a standard deviation of 0.001886 inch. (a) Why would nickel diameters vary? (b) Cons...

Q: Use Excel to generate 1,000 random integers in the range

Use Excel to generate 1,000 random integers in the range 1 through 5. (a) What are the expected mean and standard deviation? (b) Show the Excel formula you used.

Q: A random sample of 10 miniature Tootsie Rolls was taken from a

A random sample of 10 miniature Tootsie Rolls was taken from a bag. Each piece was weighed on a very accurate scale. The results in grams were (a) Construct a 90 percent confidence interval for the...

Q: Consider the Bernoulli model. What would be a typical probability of

Consider the Bernoulli model. What would be a typical probability of success (π) for (a) free throw shooting by a good college basketball player? (b) Hits by a good baseball batter? (c) Passes complet...

Q: There is a 14 percent chance that a Noodles & Company customer

There is a 14 percent chance that a Noodles & Company customer will order bread with the meal. Use Excel to find the probability that in a sample of 10 customers (a) more than five will order bread;...

Q: A sample of 20 pages was taken from a Yellow Pages directory

A sample of 20 pages was taken from a Yellow Pages directory. On each page, the mean area devoted to display ads was measured (a display ad is a large block of multicolored illustrations, maps, and te...

Q: The probability that an American CEO can transact business in a foreign

The probability that an American CEO can transact business in a foreign language is .20. Ten American CEOs are chosen at random. (a) What is the probability that none can transact business in a foreig...

Q: In a certain Kentucky Fried Chicken franchise, half of the customers

In a certain Kentucky Fried Chicken franchise, half of the customers typically request “crispy” instead of “original.” (a) What is the probability that none of the next four customers will request “cr...

Q: (a) State the values that X can assume in each

(a) State the values that X can assume in each hypergeometric scenario. (b) Use the hypergeometric PDF formula to find the probability requested. (c) Check your answer by using Excel. i. N = 10, n =...

Q: On average, 40 percent of U.S. beer drinkers

On average, 40 percent of U.S. beer drinkers order light beer. (a) What is the probability that none of the next eight customers who order beer will order light beer? (b) That one customer will? (c) T...