East Coast Railroad Company transports commodities among three routes (city-pairs): Atlanta/Baltimore, Baltimore/Pittsburgh, and Pittsburgh/Atlanta. Significant costs, their cost behavior, and activity rates for April are as follows:

Operating statistics from the management information system reveal the following for April:

Instructions

1. Prepare a contribution margin by route report for East Coast Railroad Company for the month of April. Compute the contribution margin ratio in whole percents, rounded to one decimal place.

2. Discuss the route performance of the railroad using the above report.

Note: add citations when necessary.

A paper investigated the driving behavior of teenagers by observing their vehicles as they left a high school parking lot and then again at a site approximately

mile from the school. Assume that it is reasonable to regard the teen drivers in this study as representative of the population of teen drivers.

(a) Use a .01 level of significance for any hypothesis tests. Data consistent with summary quantities appearing in the paper are given in the table. The measurements represent the difference between the observed vehicle speed and the posted speed limit (in miles per hour) for a sample of male teenage drivers and a sample of female teenage drivers. (Use μ_males − μ_females. Round your test statistic to two decimal places. Round your degrees of freedom down to the nearest whole number. Round your p-value to three decimal places.)

(b) Do these data provide convincing support for the claim that, on average, male teenage drivers exceed the speed limit by more than do female teenage drivers?

Yes

No    

1. A study was created to test which brand of tire lasts longest when driving on rough surfaces. After 5000 miles in a lab machine, the tread was measured. What type of study would this be?

2. You want to determine which degree leads to a higher starting salary, creative writing or art history. You track students with these majors for the next 5 years. What type of study would this be?

3. Which is an example of a simple random sample?

4. _________ are used to infer about __________

5. Choose all that apply. Population parameters

6. We defined our population as this class, and then collected heights of all the people in this class, and took an average. This would be an example of a

Medical Expenses (LO 5.6)

In 2018, Margaret and John Murphy (age 66 and 68, respectively) are married taxpayers who file a joint tax return with AGl of $25,400. During the year they incurred the following expenses:

Medical insurance premiums $1,150
Premiums on an insurance policy that pays $100 per day for each day Margaret is hospitalized 400
Medical care lodging (two people, one night) 65
Hospital bills 2,100
Doctor bills 850
Dentist bills 175
Prescription drugs and medicines 340
Psychiatric care 350

In addition, they drove 83 miles for medical transportation, and their insurance company reimbursed them $900 for the above expenses. On the following segment of Schedule A of Form 1040, calculate the Murphy's medical expense deduction.

If required, round any amount to the nearest dollar. Enter all amounts as positive numbers.

Caution. Do not include expenses reimbursed or paid by others. Medical and Dental Expenses 1 Medical and dental expenses (see instructions) . . . . . . . . . . . . . . 1

2 Enter amount from Form 1040, line 7. . . . . 2

3 Multiply line 2 by 7.5% (.075) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

4 Subtract line 3 from line 1. If line 3 is more than line 1, enter -0- . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Contingent Liabilities

Several months ago, Cinnabar Chemical Company experienced a hazardous materials spill at one of its plants. As a result, the Environmental Protection Agency (EPA) fined the company $1,416,000. The company is contesting the fine. In addition, an employee is seeking $342,000 damages related to injuries sustained while cleaning up the spill. Lastly, a homeowner has sued the company for $236,000. The homeowner lives 15 miles from the plant but believes that the incident has reduced the home's resale value by $236,000.

Cinnabar’s legal counsel believes that it is probable that the EPA fine will stand. In addition, counsel indicates that an out-of-court settlement of $213,750 has recently been reached with the employee. The final papers will be signed next week. Counsel believes that the homeowner's case is much weaker and will be decided in favor of Cinnabar. Other litigation related to the spill is possible, but the damage amounts are uncertain.

a. Illustrate the effects of the contingent liabilities associated with the hazardous materials spill on the accounts and financial statements. If no account or activity is affected, select "No effect" from the dropdown list and leave the corresponding number entry box blank. Enter account decreases and cash outflows as negative amounts

Simon Inc. is making the daily brownie run across the Chicago metropolitan area. They have seven customers and have identified the driving distance (in miles) between each pairwise combination as shown in the table. One-way streets and various construction projects affect driving distances such that the distance from one to the other may not be same depending on which site is the starting point. Identify the most energy efficient route that begins at Simon Inc. headquarters (Simon) and visits each customer once before returning to headquarters. Show work

You may need to use the appropriate appendix table or technology to answer this question. The port of South Louisiana, located along 54 miles of the Mississippi River between New Orleans and Baton Rouge, is the largest bulk cargo port in the world. The U.S. Army Corps of Engineers reports that the port handles a mean of 4.5 million tons of cargo per week.† Assume that the number of tons of cargo handled per week is normally distributed with a standard deviation of 0.84 million tons.

(a) What is the probability that the port handles less than 5 million tons of cargo per week? (Round your answer to four decimal places.)

(b) What is the probability that the port handles 3 or more million tons of cargo per week? (Round your answer to four decimal places.)

(c) What is the probability that the port handles between 3 million and 4 million tons of cargo per week? (Round your answer to four decimal places.)

(d) Assume that 83% of the time the port can handle the weekly cargo volume without extending operating hours. What is the number of tons of cargo per week that will require the port to extend its operating hours? (Round your answer to one decimal places.) tons of cargo per week

On March 11, 2011, Japan suffered an earthquake and tsunami that caused a disastrous accident at the Fukushima nuclear power plant. Among many other results, amounts of iodine-131 that were 27 times the government limit were found in a sample of spinach 60 miles away.† Now, 27 times the government limit of iodine-131 is 54 thousand becquerels per kilogram.† The following table shows the amount I, in thousands of becquerels per kilogram, of iodine-131 that would remain after t days.

(a)

Show that the data are exponential. (In this part and the next, round to three decimal places.)

Because t increases by 1 each time, to show that the data are exponential, we must show that the successive ratios (rounded to three decimal places) are the same. Because all of the ratios are equal to  , the data are exponential.

(b)

Find an exponential model I that shows the amount of iodine-131 present after t days.

I(t) =

(c)

How long will it take for the amount of iodine-131 to fall to the government limit of 2 thousand becquerels per kilogram? Round your answer to the nearest whole day.

days

The correct answers are highlighted. I would like an explanation for why some are null hypothesis and some are alternative. Thank you.