# Question

Shorney Construction Company bids on projects assuming that the mean idle time per worker is 72 or fewer minutes per day. A sample of 30 construction workers will be used to test this assumption. Assume that the population standard deviation is 20 minutes.

a. State the hypotheses to be tested.

b. What is the probability of making a Type II error when the population means idle time is 80 minutes?

c. What is the probability of making a Type II error when the population means idle time is 75 minutes?

d. What is the probability of making a Type II error when the population means idle time is 70 minutes?

e. Sketch the power curve for this problem.

a. State the hypotheses to be tested.

b. What is the probability of making a Type II error when the population means idle time is 80 minutes?

c. What is the probability of making a Type II error when the population means idle time is 75 minutes?

d. What is the probability of making a Type II error when the population means idle time is 70 minutes?

e. Sketch the power curve for this problem.

## Answer to relevant Questions

A federal funding program is available to low-income neighborhoods. To qualify for the funding, a neighborhood must have a mean household income of less than $15,000 per year. Neighborhoods with mean annual household income ...Injuries to Major League Baseball players have been increasing in recent years. For the period 1992 to 2001, league expansion caused Major League Baseball rosters to increase 15%. However, the number of players being put on ...The Professional Golf Association (PGA) measured the putting accuracy of professional golfers playing on the PGA Tour and the best amateur golfers playing in the World Amateur Championship (Golf Magazine, January 2007). A ...Condé Nast Traveler conducts an annual survey in which readers rate their favorite cruise ship. All ships are rated on a 100-point scale, with higher values indicating better service. A sample of 37 ships that carry fewer ...Find the following F distribution values from Table 4 of Appendix B. a. F.05 with degrees of freedom 5 and 10 b. F.025 with degrees of freedom 20 and 15 c. F.01 with degrees of freedom 8 and 12 d. F.10 with degrees of ...Post your question

0