In order to estimate the difference between the average Miles per Gallon of two different models...
In order to estimate the difference between the average Miles per Gallon of two different models of cars, samples are taken and the following information is collected.
Model A
Sample Size 16
Sample Mean 29
Sample Variance 16
Model B
Sample Size 18
Sample Mean 26
Sample Variance 9
Note: Assume that both populations are normally distributed.
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a) (16 points) Find a 95% confidence interval for the difference between the average Miles per Gallon for the two models.
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b) (4 points) From your answer in Part a), is there conclusive evidence that one model gets a significantly higher average MPG than the other? Why or why not? Explain.
please show all work neatly
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In order to estimate the difference between the average Miles
per Gallon of two different models...
In order to estimate the difference between the average miles per gallon of two different models...
In order to estimate the difference between the average miles per gallon of two different models of automobiles, samples are taken and the following information is collected. Model A Model B Sample Size 60 55 Sample Mean 2 25 Sample Variance 16 9 At 95% confidence develop an internal estimate for the difference between the average miles per gallon for the two models.
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2) In order to develop a confidence interval for the average miles per gallon (MPG) for a brand of hybrid car, a simple random sample of 97 cars is selected from the population of 10,000 cars manufactured. The 97 cars had a sample mean MPG of 51.9 MPG and a sample standard deviation of 4.5 MPG. (6 points) a) Compute a 99% confidence interval for the average miles per gallon (MPG) for this brand of car. b) Imagine that an...
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a certain car model has a mean gas mileage of 34 Miles per
gallon (mpg) with a population standard deviation for. A pizza
delivery company buys a sample of 54 of these cars. What is the
probability that the average mileage of the fleet is greater than
33.7 MPG?
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