1. Math
  2. Statistics And Probability
  3. please put clear and easy to read responses thank you...

Question: please put clear and easy to read responses thank you...

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PLEASE PUT CLEAR AND EASY TO READ RESPONSES! THANK YOU!

4. National Fue!saver Corporation manufactures the Platinum Gasaver, a device they claim “may increase gas mileage by 30%. Here are the percent changes in gas mileage for 15 identical, randomly-selected vehicles, as presented in one of the companys advertisements 2.4 6.9 10.410.8 24.8 28.7 28.733.734.6 38.5 40.244.646.846.948.3 (a) The sample mean is x = 29.43 and the sample standard deviation is s = 16.23. Calculate and interpret the standard error of the mean for these data. (b) Construct and interpret a 90% confidence interval to estimate the mean change (in percent) in gas mileage. Does the data support the companys claim? Use the four-step process

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