(6 points) Part 1: Confidence Intervals for Quantitative Data, V3 Return to Lab 3-part 2C to find values for your V3 variable Name of V3: rating What was the sample mean? 48 .7 the standard deviation?_ 18.07 A. Using the sample mean, form a 95% confidence interval for the mean of your population. Assume the standard deviation for V3 from Lab 3 is the population standard deviation. B. Use the method discussed in class to write the interval in statement form. It is not sufficient to write an algebraic inequality. You must write a statement of the form: "I am 95% confident that the actual mean age of U.S. Senators is between 54.2 and 60.1." C. Repeat A and B for a 99% confidence interval. D. State clearly the difference between these two confidence intervals. (Explain which is wider and why.)