Questions from Applied Statistics

Q: A nuclear power plant replaces its ID card facility access system cards

A nuclear power plant replaces its ID card facility access system cards with a biometric security system that scans the iris pattern of the employee and compares it with a data bank. Users are classif...

Q: From the display below pick five cards (without replacement) by

From the display below pick five cards (without replacement) by using random numbers. Explain your method. Why would the other sampling methods not work well in this case?

Q: A process is normally distributed with standard deviation 12. Samples of

A process is normally distributed with standard deviation 12. Samples of size 4 are taken. Suppose that you wish to test the hypothesis that μ 5 500 at α = .05 in a left-tailed test. (a) What is the β...

Q: A certain brand of flat white interior latex paint claims one-

A certain brand of flat white interior latex paint claims one-coat coverage of 400 square feet per gallon. The standard deviation is known to be 20. A sample of 16 gallons is tested. (a) At α = .05 in...

Q: A poker hand (5 cards) is drawn from an ordinary

A poker hand (5 cards) is drawn from an ordinary deck of 52 cards. Find the probability of each event, showing your reasoning carefully. a. The first four cards are the four aces. b. Any four cards a...

Q: Find the standard normal area for each of the following. Sketch

Find the standard normal area for each of the following. Sketch the normal curve and shade in the area represented below. a. P(Z < -1.28) b. P(Z > 1.28) c. P(-1.96 < Z < 1.96) d. P(-1.65 < Z < 1.6...

Q: A certain airplane has two independent alternators to provide electrical power.

A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a one-hour flight is .02. What is the probability that (a) both wil...

Q: Which are likely to be independent events? For those you think

Which are likely to be independent events? For those you think are not, suggest reasons why. a. Gender of two babies born consecutively in a hospital. b. Car accident rates and the driver’s gender. c...

Q: A web server hosting company advertises 99.999 percent guaranteed network

A web server hosting company advertises 99.999 percent guaranteed network uptime. (a) How many independent network servers would be needed if each has 99 percent reliability? (b) If each has 90 percen...

Q: The probability is 1 in 4,000,000 that a

The probability is 1 in 4,000,000 that a single auto trip in the United States will result in a fatality. Over a lifetime, an average U.S. driver takes 50,000 trips. (a) What is the probability of a f...