The price-earnings (PE) ratios of a sample of stocks have a mean value of 14.25 and a standard deviation of 2.3. If the PE ratios have a bell shaped distribution, use the 68-95-99.7 Rule to estimate the percentage of PE ratios that fall between: A. 11.95 and 16.55. Percentage =  % B. 9.65 and 18.85. Percentage =  % C. 7.35 and 21.15. Percentage =  %

The frequency distribution was obtained using a class width of 0.5 for data on cigarette tax rates. Use the frequency distribution to approximate the population mean and population standard deviation. Compare these results to the actual mean u = $1.506 and standard deviation o = $1.004. Click the icon to view the frequency distribution for the tax rates. Frequency distribution of cigarette tax rates Tax Rate Frequency 0.00–0.49 7 0.50-0.99 14 1.00–1.49 7 1.50–1.99 2.00–2.49 5 2.50–2.99 5 3.00–3.49 3.50–3.99 1 4.00-4.49 1

The accompanying data are 45 commute times to work in minutes for workers of age 16 or older in Chicago. Construct a frequency distribution. Use a class width of 15 minutes and begin with a lower class limit of 0 minutes. Do the data amounts appear to have a normal distribution? Examine the data and identify anything appearing to be unique. Click the icon to view the commute times. Construct the frequency distribution. Commute Time (minutes) 0- Frequency Commute Times 60 15 35 30 45 10 15 15 30 12 30 30 45 30 20 20 15 25 45 15 28 30 30 60 30 45 30 12 45 20 10 45 35 60 20 20 30 4 80 45 30 60 45 25 30 (Type whole numbers.) 1 X

QUESTION 2 What percent of scores are above an ACT score of 19?

People's oxygen saturation  is normally distributed and has a mean measurement of 98.7 and a standard deviation of 1.2. Find the oxygen saturation for P35