Questions from Applied Statistics

Q: A study by the Parents’ Television Council showed that 80 percent of

A study by the Parents’ Television Council showed that 80 percent of movie commercials aired on network television between 8 and 9 p.m. (the prime family viewing hour) were for R-rated films. (a) Find...

Q: Write the Excel formula for each Poisson probability, using a mean

Write the Excel formula for each Poisson probability, using a mean arrival rate of 10 arrivals per hour. a. Seven arrivals. b. Three arrivals. c. Fewer than five arrivals. d. At least 11 arrivals....

Q: The caffeine content of a cup of home-brewed coffee is

The caffeine content of a cup of home-brewed coffee is a normally distributed random variable with a mean of 115 mg with a standard deviation of 20 mg. (a) What is the probability that a randomly chos...

Q: The fracture strength of a certain type of manufactured glass is normally

The fracture strength of a certain type of manufactured glass is normally distributed with a mean of 579 MPa with a standard deviation of 14 MPa. (a) What is the probability that a randomly chosen sam...

Q: Tire pressure in a certain car is a normally distributed random variable

Tire pressure in a certain car is a normally distributed random variable with mean 30 psi (pounds per square inch) and standard deviation 2 psi. The manufacturer’s recommended correct inflation range...

Q: Two hundred employee travel expense reimbursement vouchers were filed last year in

Two hundred employee travel expense reimbursement vouchers were filed last year in the finance department at Ramjac Corporation. Of these, 20 contained errors. A corporate auditor audits a sample of f...

Q: Noodles & Company wants to estimate the percent of customers who order

Noodles & Company wants to estimate the percent of customers who order dessert, with 95 percent confidence and an error of ±10%. What is the required sample size?

Q: Lunch customers arrive at a Noodles & Company restaurant at an average

Lunch customers arrive at a Noodles & Company restaurant at an average rate of 2.8 per minute. Define X to be the number of customers to arrive during a randomly selected minute during the lunch hour...

Q: Shower temperature at the Oxnard Health Club showers is regulated automatically.

Shower temperature at the Oxnard Health Club showers is regulated automatically. The heater kicks in when the temperature falls to 998F and shuts off when the temperature reaches 1078F. Water temperat...

Q: In the last 50 years, the average number of deaths due

In the last 50 years, the average number of deaths due to alligators in Florida is 0.3 death per year. Assuming no change in this average, in a given year find the probability of (a) no alligator deat...