An insurance company crashed four cars in succession at 5 miles per hour. The cost of repair for each of the four crashes was $419, $458, $403, $212 . Compute the range, sample variance, and sample standard deviation cost of repair. The range is $ s2 =O dollars? (Round to the nearest whole number as needed.) s = S] (Round to two decimal places as needed.)

Please answer a and b

The amount of caffeine in a sample of five-ounce servings of brewed coffee is shown in the histogram. Make a frequency distribution for the data. Then use the table to estimate the sample mean and the sample standard deviation of the data set. Click the icon to view the histogram. Complete the table. Round values to the nearest tenth as needed. Graph/chart f Midpoint x xf 70.5 Ay 30- 92.5 26 25- 114.5 136.5 20- 158.5 15- 12 Ef = Exf = 10- Find the mean of the data set. 5- X = (Round to the nearest tenth as needed.) 48.5 70.5 92.5 114.5 136.5 158.5 Complete the table. Round values to the nearest tenth as needed. Midpoint x (x-x)? (x-x)?f X-X 70.5 Print Done 92.5 114.5 136.5 158.5 (x-x)?r= ] of

. State the interval estimate that contains more possible values of the population mean (precision) for a 90% CI or a 95% CI for the same data.