Engineers are testing company fleet vehicle fuel economy (miles per gallon) performance by using different types of fuel. One vehicle of each size is tested. Does this sample provide sufficient evidence to conclude that there is a significant difference in treatment means?

(a) Choose the correct statement.

• Fuel type is the blocking factor and vehicle size is the treatment.

• Fuel type is the treatment and vehicle size is the blocking factor.

(b) Fill in the boxes. (Round your SS values to 3 decimal places, F values to 2 decimal places, and other answers to 4 decimal places.)

(c) Choose the correct statement. Use α = 0.05.

• Fuel type means differ significantly and vehicle size is also a significant factor.

• Fuel type means do not differ significantly, but vehicle size is a significant factor.

• Fuel type means differ significantly, but vehicle size is not a significant factor.

• Fuel type means do not differ significantly and vehicle size is not a significant factor.

(d) Which fuel types show a significant difference in average fuel economy? Use α = 0.05. (You may select more than one answer. Click the box with a check mark for the correct answer and click to empty the box for the wrong answer.)

• Ethanol 10% and 87 Octane

• Ethanol 5% and 89 Octane

• 87 Octane and 91 Octane

• Ethanol 10% and 91 Octane

When speed limits were increased from 55 to 65 miles per hour a news item appeared in the Chicago Tribune, which showed that deaths on Illinois highways increased since the speed limits were raised to 65 mph. (a) Assuming that the faster speed caused the deaths, does this prove that cost-benefit analysis was not used in the decision to return to the 65 mph speed limit. (b) What is being implied if we do not go back to the 55 mph limit?

A credit card company wondered whether giving frequent flier miles for every purchase would increase card usage. The population mean had been $2500 per year. A simple random sample of 22 credit card customers found the sample mean to be $2542 with a standard deviation of $110. Test the claim that the credit card mean usage for the population is now different than $2500 per year. (use the traditional approach).

A car company advertises that thir Super Spiffy Sedan averages 29mpg (miles per gallon). You randomly select a sample of Super Spiffies from local car dealerships and test their gas mileage under similar conditions.

You get the following MPG scores:

33 27 32 34 34 28 27 31

Note: SSx = 63.50

Using alpha =.01, conduct the 8 steps to hypothesis testing to determine whether the actual gas mileage for these cars differs significantly from 29mpg.

Engineers are testing company fleet vehicle fuel economy (miles per gallon) performance by using different types of fuel. One vehicle of each size is tested. Does this sample provide sufficient evidence to conclude that there is a significant difference in treatment means?

(b) Fill in the boxes. (Round your SS values to 3 decimal places, F values to 2 decimal places, and other answers to 4 decimal places.)

Engineers are testing company fleet vehicle fuel economy (miles per gallon) performance by using different types of fuel. One vehicle of each size is tested. Does this sample provide sufficient evidence to conclude that there is a significant difference in treatment means?

  Click here for the Excel Data File

(a) Choose the correct statement.

• Fuel type is the blocking factor and vehicle size is the treatment.

• Fuel type is the treatment and vehicle size is the blocking factor.

(b) Fill in the boxes. (Round your SS values to 3 decimal places, F values to 2 decimal places, and other answers to 4 decimal places.)

(c) Choose the correct statement. Use α = 0.05.

• Fuel type means differ significantly and vehicle size is also a significant factor.

• Fuel type means do not differ significantly, but vehicle size is a significant factor.

• Fuel type means differ significantly, but vehicle size is not a significant factor.

• Fuel type means do not differ significantly and vehicle size is not a significant factor.

(d) Which fuel types show a significant difference in average fuel economy? Use α = 0.01. (You may select more than one answer. Click the box with a check mark for the correct answer and click to empty the box for the wrong answer.)

• Ethanol 10% and Ethanol 5%

• 89 Octane and 87 Octane

• Ethanol 5% and 91 Octane

• Ethanol 10% and 91 Octane

Let’s return to Tuftsville (Chapter 10) where everyone lives along Main Street, which is 10 miles long. There are 1,000 people uniformly spread up and down Main Street, and every day they each buy fruit smoothie from one of the two stores located at either end of the street. Customers ride their motor scooters to and from the store, using $0.50 worth of gas per mile. Customers buy their smoothies from the store offering the lowest price, which is the store’s price plus the customer’s travel expenses getting to and from the store. Ben owns the store at the west end of Main Street and Will owns the store at the east end of Main Street. The marginal cost of a smoothie is constant and equal to $1 for both Ben and Will. In addition, each of them pays Tuftsville $250 per day for the right to sell smoothies.

a. Ben sets his price p1 first and then Will sets his price p2. After the prices are posted consumers get on their scooters and buy from the store with the lowest price including travel expenses. What prices will Ben and Will set?

b. How many customers does each store serve and what are their profits?

QUESTION 48

Mason, a stockbroker, runs two miles every day after work because it reduces his level of stress. Mason's running habit is maintained by a ________ reinforcer.

1 points   

QUESTION 49

John is displaying behavior problems in his third grade classroom. He becomes disruptive whenever called to reading group. His teacher sends him down to the principal's office for discipline. His disruptions continue. A functional behavioral assessment on John, who has yet undiagnosed dyslexia, identifies being sent to the principal as a ______________.

1 points   

QUESTION 50

Every Saturday morning, Arnold quickly washes the family's breakfast dishes so that his father will allow him to wash his car. In this instance, washing the car is a(n)

1 points   

QUESTION 51

After one chimpanzee sees a second chimp open a box that contains a food reward, the first animal opens a similar box with great speed. This best illustrates

1 points   

QUESTION 52

Pets who learn that the sound of an electric can opener signals the arrival of their food illustrate

1 points   

QUESTION 53

Some information in our fleeting ________ is encoded into short-term memory.