JLUIU- U} 1.0 lei1'. llbv'vEICl-l . Question 13 v To build a 95% CI for the mean of a population, you take a random sample of 20 values and find that the sample mean is 209.6 with standard deviation 12. Round all intermediate calculations [including the critical value, To} to two decimals, then construct the Cl and enter like this: {min,max}. Be sure to include the parentheses or you will be marked wrong. Note: if you use a built-in Cl command on a calculatorfcomputer, you might get marked wrong due to rounding. Use the formulas given in the textr'notes. . Question 14 6 Frequency 9.5 19.529.539.549.559.569.579.589.5 Ages Q You wish to estimate the mean age of a population. A random sample of 20 ages is shown in the histogram. Can you use a T-interval to make your estimate? Yes, because the shape of sample data distribution does not matter O Yes, you can just use the standard deviation from the sample in place of o O No, because there is no known value of o to use O No, because n