could you please explain both of them? I didn't understand An automobile dealer has an inventory of 200 used cars. To estimate the mean mileage of this inventory, she intends to take a simple random sample of used cars.Previous studies suggest that the population standard deviation is 10,000 miles. A 90% confidence interval for the population mean must extend 2,500 miles on eachside of its sample estimate. How large of a sample size is necessary to satisfy this requirement?The minimum sample size needed to satisfy the requirement is(Round up to the nearest whole number.) A random sample of six salespersons that attended a motivational course on sales techniques was monitoredthree months before and three months after the course. The table shows the values of sales (in thousands ofdollars) generated by these six salespersons in the two periods.Salesperson Before the Course After the Course217242284292319619243303515158190198179Assume that the population distributions are normal. Find an 80% confidence interval for the difference between the two population means.What is the confidence interval estimate of the mean difference (uafter - Hbefore)?(Round to two decimal places as needed.)

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An automobile dealer has an inventory of 200 used cars. To estimate the mean mileage of this inventory, she intends to take a simple random sample of used cars. Previous studies suggest that the population standard deviation is 10,000 miles. A 90% confidence interval for the population mean must extend 2,500 miles on each side of its sample estimate. How large of a sample size is necessary to satisfy this requirement? The minimum sample size needed to satisfy the requirement is (Round un to the nearest whole pumber )

An automobile dealer has an inventory of 200 used cars. To estimate the mean mileage of this inventory, she intends to take a simple random sample of used cars. Previous studies suggest that the population standard deviation is 10,000 miles. A 90% confidence interval for the population mean must extend 2,500 miles on each side of its sample estimate. How large of a sample size is necessary to satisfy this requirement? The minimum sample size needed to satisfy the requirement is (Round un to the nearest whole pumber )

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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