Questions from Applied Statistics

Q: Define Type I and Type II error for each scenario, and

Define Type I and Type II error for each scenario, and identify the cost(s) of each type of error. a. A 25-year-old ER patient in Minneapolis complains of chest pain. Heart attacks in 25-year olds ar...

Q: The mean arrival rate of flights at O’Hare Airport in marginal weather

The mean arrival rate of flights at O’Hare Airport in marginal weather is 195 flights per hour with a historical standard deviation of 13 flights. To increase arrivals, a new air tra...

Q: An airline serves bottles of Galena Spring Water that are supposed to

An airline serves bottles of Galena Spring Water that are supposed to contain an average of 10 ounces. The filling process follows a normal distribution with process standard deviation 0.07 ounce. Twe...

Q: On the midnight shift, the number of patients with head trauma

On the midnight shift, the number of patients with head trauma in an emergency room has the probability distribution shown below. (a) Find P(X > 3). (b) Find P(X < 2). (c) Find P(X < 4). (d) Find P(X...

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. Response times are normally distributed with a standard deviation of 1 minute. Would a sample of 18 fire...

Q: Discuss the issues of statistical significance and practical importance in each scenario

Discuss the issues of statistical significance and practical importance in each scenario. a. A process for producing I-beams of oriented strand board used as main support beams in new houses has a mea...

Q: The target activation force of the buttons on a keyless entry clicker

The target activation force of the buttons on a keyless entry clicker is 1.967 newtons. Variation exists in activation force due to the nature of the manufacturing process. A sample of 9 clickers show...

Q: A firm decides to test its employees for illegal drugs. (

A firm decides to test its employees for illegal drugs. (a) State the null and alternative hypotheses. (b) Define Type I and II errors. (c) What are the consequences of each type of error, and to whom...

Q: Estimate the p-value as a range using Appendix D (

Estimate the p-value as a range using Appendix D (not Excel): Appendix D: a. t = 1.457, d.f. = 14, right-tailed test b. t = 2.601, d.f. = 8, two-tailed test c. t = 21.847, d.f. = 22, left-tailed te...

Q: Calculate the test statistic and p-value for each sample.

Calculate the test statistic and p-value for each sample. State the conclusion for the specified α.