Question

In: Statistics and Probability

Experts have predicted that approximately 1 in 12 tractor-trailer units will be involved in an accident...

Experts have predicted that approximately 1 in 12 tractor-trailer units will be involved in an accident this year. One reason for this is that 1 in 3 tractor-trailer units has an imminently hazardous mechanical condition, probably related to the braking systems on the vehicle.

1. If you wanted to calculate a 99% confidence interval that is no wider than 0.06, how many tractor-trailers would you need to sample?

Expert Solution

Solution,

Given that,

= 1 - = 0.5

margin of error = E = 0.06

At 99% confidence level

= 1 - 99%

= 1 - 0.99 =0.01

/2 = 0.005

Z/2 = Z0.005 = 2.576

sample size = n = (Z / 2 / E )2 * * (1 - )

= (2.576 / 0.06)2 * 0.5 * 0.5

= 460.81

sample size = n = 461

orchestra answered 1 year ago

Bau Long-Haul, Inc., is considering the purchase of a tractor-trailer that would cost $325,526, would have...

Bau Long-Haul, Inc., is considering the purchase of a tractor-trailer that would cost $325,526, would have a useful life of 7 years, and would have no salvage value. The tractor-trailer would be used in the company's hauling business, resulting in additional net cash inflows of $83,000 per year. The internal rate of return on the investment in the tractor-trailer is closest to (Ignore income taxes.): Noreen_5e_Rechecks_2019_10_16 Multiple Choice 19% 17% 14% 16%

Bau Long-Haul, Inc., is considering the purchase of a tractor-trailer that would cost $281,660, would have...

Bau Long-Haul, Inc., is considering the purchase of a tractor-trailer that would cost $281,660, would have a useful life of 7 years, and would have no salvage value. The tractor-trailer would be used in the company's hauling business, resulting in additional net cash inflows of $80,000 per year. The internal rate of return on the investment in the tractor-trailer is closest to (Ignore income taxes.): Click here to view Exhibit 13B-1 and Exhibit 13B-2, to determine the appropriate discount factor(s)...

The Fitzgeralds (who have a PAP) are involved in an automobile accident that was not their...

The Fitzgeralds (who have a PAP) are involved in an automobile accident that was not their fault on their way home from a dinner party. Although they are unharmed, their car is disabled. The police recommend that they leave the car by the side of the road and take a taxi home. When the Fitzgeralds return to the scene of the accident, they find that their car has been stripped down to the chassis. The Fitzgeralds submit a claim to...

1. Many experts recommend a replacement rate of approximately _______ of preretirement income. a. 50% b....

1. Many experts recommend a replacement rate of approximately _______ of preretirement income. a. 50% b. 2/3 c. 75% d. 80% 2. True/False. The cost of capital of a particular project of a firm should always be the same as the risk of the firm’s existing assets. 3. Sensitivity analysis tests whether a project: a. Will still be worthwhile if some of the variables are changed b. Will be economically feasible to begin with c. Will have a rate of...

An 18-year-old male (grade 12 learner), was involved in a pedestrian vehicle accident (PVA), four days...

An 18-year-old male (grade 12 learner), was involved in a pedestrian vehicle accident (PVA), four days ago. He sustained head injuries with subdural haemorrhage and fractures of ribs 2-4 on the left with left haemothorax. He is day 4 in the intensive care unit (ICU), intubated and mechanically ventilated on SIMV (pressure control) + pressure support mode. His GCS is 2/10. An intercostal drainage (ICD) was inserted on the left. . Formulate a concept map that has the following criteria:...

1. Two cars are involved in a car accident with the following facts: Tim, the driver...

1. Two cars are involved in a car accident with the following facts: Tim, the driver of car two is behind Oliver the driver of car one. Oliver uses his left turn signal and moves to the left turning lane but after he does this he changes his mind and immediately pulls back into the right driving lane but does not signal before moving into the driving lane. As he does this, Tim slams on the brakes but his car...

12. What is one way that psychologists have predicted a child’s attachment to her father? 13....

12. What is one way that psychologists have predicted a child’s attachment to her father? 13. When does separation anxiety typically peak? 14. What is stranger anxiety and when does it occur? 15. What are some of the long term benefits of a solid attachment?

Per the text book, OB experts have proposed 12 mechanisms or levers for changing organizational culture....

Per the text book, OB experts have proposed 12 mechanisms or levers for changing organizational culture. These levers can be pushed to create a preferred type of culture, or they can be pulled to reduce a particular culture type. Changing culture amounts to pushing and pulling these levers to create a culture profile that is best suited to help an organization achieve its goals. These mechanisms or levers include: Formal statements of organizational philosophy, mission, vision, values, and materials used...

1) Accident rates for a random sample of n1 = 12 regions in the Northern region...

1) Accident rates for a random sample of n1 = 12 regions in the Northern region have a mean M1 = 3.97 with SS1 = 13.2. In the Midwestern States a random sample of n2 = 10 has M2 = 3.75 with SS2 = 9.9. Use α = 0.05 to determine if the accident rate in the Northern region is significantly different. a) Identify the null and alternate hypotheses b) Compute the degrees of freedom c)...

Question No. 1-1 The HASF Company has an annual plant capacity of 50,000 units. Predicted data...

Question No. 1-1 The HASF Company has an annual plant capacity of 50,000 units. Predicted data on sales and costs are given below. Sales (50 per unit) 1,000,000 Manufacturing cost Variable (material labor and overhead) 40 per unit Fixed overhead 30,000 Selling and administrative expenses Variable (sales commission RS 0.5 per unit) 2 per unit Fixed 7,000 A special order has been received from outside for 5,000 units at a selling price of 45 per...