Questions from Applied Statistics

Q: For a certain wine, the mean pH (a measure of

For a certain wine, the mean pH (a measure of acidity) is supposed to be 3.50 with a known standard deviation of σ = .10. The quality inspector examines 25 bottles at random to test whether the pH is...

Q: What is the consequence of a false positive in a weekly inspection

What is the consequence of a false positive in a weekly inspection of a nuclear plant’s cooling system? Hint: The null hypothesis is the status quo (things are OK).

Q: Repeat the previous exercise, using α = .05. For

Repeat the previous exercise, using α = .05. For each true value of μ, is the power higher or lower? Previous exercise: For a certain wine, the mean pH (a measure of acidity) is supposed to be 3.50...

Q: The mean life of a certain computer hard disk in continual use

The mean life of a certain computer hard disk in continual use is 8 years. (a) How long a warranty should be offered if the vendor wants to ensure that not more than 10 percent of the hard disks will...

Q: The Scottsdale fire department aims to respond to fire calls in 4

The Scottsdale fire department aims to respond to fire calls in 4 minutes or less, on average. State the hypotheses you would use if you had reason to believe that the fire department’s claim is not b...

Q: Give an example of how statistics might be useful to the person

Give an example of how statistics might be useful to the person in the scenario. a. An auditor is looking for inflated broker commissions in stock transactions. b. An industrial marketer is representi...

Q: Give an example of how statistics might be useful to the person

Give an example of how statistics might be useful to the person in the scenario. a. A personnel executive is examining job turnover by gender in different restaurants in a fast food chain. b. An intr...

Q: (a) Should the average business school graduate expect to use

(a) Should the average business school graduate expect to use computers to manipulate data, or is this a job better left to specialists? (b) What problems arise when an employee is weak in quantitativ...

Q: (a) The table shows the number of days on the

(a) The table shows the number of days on the market for the 36 recent home sales in the city of Sonando Hills. Construct a frequency distribution and histogram, using nice (round) bin limits. (b) Des...

Q: (a) The table shows raw scores on a state civil

(a) The table shows raw scores on a state civil service exam taken by 24 applicants for positions in law enforcement. Construct a frequency distribution and histogram, using nice (round) bin limits. (...