Two fuel additives are being tested to determine their effect on gasoline mileage. Seven cars were tested with additive 1 and nine cars were tested with additive 2. The following data show the miles per gallon obtained with the two additives.

Find the value of the test statistic and p-value.

please do step by step? I saw there was a similar problem but table 8 in Appendix B Tables isn't there so I wasn't able to finish the answer.

A national organization has been working with utilities throughout the nation to find sites for large wind machines that generate electricity. Wind speeds must average more than 25 miles per hour (mph) for a site to be acceptable. Recently, the organization conducted wind speed tests at a particular site. Based on a sample of 43 wind speed recordings (taken at random intervals), the wind speed at the site averaged 25.8 mph, with a population standard deviation of 4.2 mph

a. Construct a 95% confidence interval for the mean wind speed

b. Calculate the p−value of the test statistic

c. Test whether the site meets the organization’s requirements at the 5% level of significance

You are looking to purchase a new vehicle for $24,500. This vehicle gets 21 mpg and you average driving 15,000 miles per year. You expect that gasoline will average $2.40 per gallon for the first year and will increase 15% per year but it will never get above $5 per gallon because of government controls. Maintenance is included for the first two years but after that you think that maintenance will cost $1,000 and increase by 10% per year after that. The vehicle will lose 30% of its value the first year but the salvage value will only decrease by 10% per year after that. For an interest rate of 6%, what is the economic life of the vehicle?

Assume you are working at the Consumer Protection Agency. Recently, you have been getting complaints about the highway gas mileage of a new minivan. The car company agrees to allow you to select randomly 41 of its new minivans to test their highway mileage. The company claims that its minivans get 28 miles per gallon on the highway. Your test results show a sample mean of 26.7 and a sample standard deviation of 4.2.

Part 1 (Confidence Interval):

Calculate a 95% confidence interval around your sample mean.

Is the claimed mean inside your confidence interval?

What does your result mean, in terms of the company's claim?

5a. The tires on a new compact car have a diameter of 2.0 ft and are warranted for 56,000 miles. How many revolutions will the tires go during the warranty period?

5b. A top-loading washing machine has a cylindrical basket that rotates about a vertical axis. The basket of one such machine starts from rest and reaches an angular speed of 5.0 rev/s in 10.0 s. The lid of the machine is then opened, which turns off the machine, and the basket slows to rest in 13.0 s. Through how many revolutions does the basket turn during this 23 s interval? Assume constant angular acceleration while it is starting and stopping.

with the current US national debt being $21 trillion dollars, if it was all paid of at once in $100 dollar bills, how many $100 dollars bills would it take and how much would those $100 dollar bills weigh in tons? this is the equvilant to how many loaded tractor trailer rigs (80000 # each) if the $100 bills were laid on the ground like a carpet how big of an area would it cover (square miles) assume that someone can count 5 bills per second and never stop. if everyone in Atlanta Georgia started counting the bills how long would it take to count all of the $100 bills?

A Parasail rider wants to reach the maximum height allowed by the Federal Aviation administration... A Parasail rider wants to reach the maximum height allowed by the Federal Aviation administration if the rider’s boat is to tow the parachute at 30 miles per hour. How should the tow to reach the maximum flying height? A. Draw and label a diagram to represent this situation. B. Explain two different methods to solving this problems Method 1: Method 2: C. Find the length of the tow line using both methods from part (b) Write a “ rule of thumb” that does not require trigonometry for calculating the maximum height of a parasail rider given the length of the tow line?

A business consultant for the National Transportation Safety Board (NTSB), collected data on the safety of hybrid automobiles traveling at 30, 40 and 50 miles per hour.  She randomly assigned the same hybrid model to each condition and collected data on the pressure applied to the driver’s head during a crash into a wall at each speed.

What is the independent variable? Dependent variable?

Is she able to make cause and effect statements about the cars the head pressure? Explain.  Give a hypothetical cause and effect statement.

Assume for a moment that she randomly selected 9 hybrids from the thousands of hybrids produced by the manufacturer.  Is she able to generalize to all automobiles produced by that manufacturer? Explain.

MPG
36.3
41
36.9
37.1
44.9
36.8
30
37.2
42.1
36.7
32.7
37.3
41.2
36.6
32.9
36.5
33.2
37.4
37.5
33.6

1. The EPA collects data on 20 cars and calculates their gas mileage in miles per gallon (MPG).

d) Using the modified box-plot methodology determine if there are any outliers and justify. You do not have to make the box-plot!

e) Create a new variable by subtracting the mean from each observation and then dividing the difference by the standard deviation.

f) Find the mean, median and standard deviation of the new variable.

g) In one or two sentences, describe the original data.