Part II: Exploration 8. Assume the age distribution of US college students is approximately normal with a mean of 22.48 and a standard deviation of 6 4.74 years. a) Use the 68-95-99.7 Rule to estimate the proportion of ages that lie between 13 & 31.96 years old. b) Use the Standard Normal Table (or TI-graphing calculator) to compute (to four-decimal accuracy) the proportion of ages that lie between 13 & 31.96 years old. C) Access the link http://www.rossmanchance.com/applets/NormCalc.html Enter Age for Variable Enter 22.48 for Mean. Enter 4.74 for SD. Note: Leave the 3" row Mean & SD fields empty. Click on Scale to Fit. Select the button to the left of the first "