2. For each of the following variables, indicate if it is quantitative or categorical and also indicate the scale of measurement used for each:

The Gender of an individual

The Weight(pounds) of a package

The Income(dollars) of an individual

The Distance(miles) between two cities

Suppose the federal government is considering requiring all new trucks to meet a new higher efficiency standard of 50 miles per gallon. Give an example of a cost and a benefit that might arise from this policy change.

A contractor plans to use a wheeled loader to move 5,000 BCY of soil 500 feet using a 50-minute working hour. The soil has a swell of 15%. The loader has a bucket capacity of 2.5 cubic yards. The soil has a fill factor of 1.2 and a weight of 2,500 lbs per LCY. The loader has an STL of 50% of 15,000 lbs. The loader will haul in one direction loaded at 2.5 miles per hour and return at 3.5 miles per hour. The total cost of the tractor is $55.00 per hour.  It has a fixed time of .35 minutes. Remember that the loader will be moving the dirt in its loose state. How many days will it take to move all of the dirt working 8 hours per day?

There are various depreciation methods that require an adjustment to Cost for the asset's estimated residual value. These are 1) Straight-line, 2) Units-of-Production, and 3) Sum-of-the-years-digits.

For Double-Declining, no adjustment to cost is made. The residual value is left un-depreciated at the end.

A New Truck had a cost of $35,000 and was expected to operate for five years. It is estimated to be worth $3,000 at the end of it's useful life of 100,000 miles. The truck was used 25,000 miles in year one and 20,000 in year two.

A) Under each of these methods what will be the book value of the truck at the end of it's useful life?
B) How much is year one's depreciation using sum-of-the year digits, unit-of-production and double-declining balance.

1.)Do heavier cars really use more gasoline? Suppose a car is chosen at random. Let x be the weight of the car (in hundreds of pounds), and let y be the miles per gallon (mpg). Write out the least-squares line y=a+bx

2.)Do heavier cars really use more gasoline? Suppose a car is chosen at random. Let x be the weight of the car (in hundreds of pounds), and let y be the miles per gallon (mpg). The estimate y value found in the previous question is _____ (answers are either: an extrapolation, an interpolation, an error, or a residual)

1.)Do heavier cars really use more gasoline? Suppose a car is chosen at random. Let x be the weight of the car (in hundreds of pounds), and let y be the miles per gallon (mpg). Write out the least-squares line y=a+bx

2.)Do heavier cars really use more gasoline? Suppose a car is chosen at random. Let x be the weight of the car (in hundreds of pounds), and let y be the miles per gallon (mpg). The estimate y value found in the previous question is _____ (answers are either: an extrapolation, an interpolation, an error, or a residual)

George and June are active volunteers in their local church. George serves as an usher one Sunday morning a month. June sings in the church choir every Sunday morning and attends choir practice each Wednesday evening. Based on the distance from their home to church, June drives 500 miles a year to attend choir practice and sing on Sunday. George leaves home by himself to arrive at church early on the mornings he serves as an usher and put 120 miles on his car this year on these trips. June paid $1,000 for singing lessons to improve her voice so that she might be chosen to sing a solo at church. Are any of these expenses related to serving as an usher or singing in the church choir deductible by George or June?

A researcher is interested in evaluating a certain brand of radial auto tire. Twenty tires are randomly selected from retail outlets throughout the country, and each is placed on a special machine which rotates the tires at a constant speed (equivalent to 55 miles per hour) against the friction equivalent of a 4000 pound auto being driven on a smooth highway. Each tire is run until there is no tread left. The number of miles (in thousands) were as follows: 40, 30, 32, 35, 39, 35, 31, 36, 37, 35, 34, 35, 37, 34, 36, 38, 35, 36, 35, 36.

Setting alpha at .01, test the hypothesis that this sample of tires could represent a population whose mean was 36.50.