Age of College Students Find the 90% confidence intervals for the variance and standard deviation of the ages of seniors at Oak Park College if a random OO sample of 25 students has a standard deviation of 1.9 years. Assume the variable is normally distributed. Use the chi-square distribution table to find any chi- square values to three decimal places. Round the final answers to one decimal place. X 5SAT Scores Estimate the variance in mean mathematics SAT scores by state. using the randomly selected scores listed below. Estimate with 90% confidence. Assume the variable is normally distributed Round the sample variance and final answers to one decimal place. 502 499 469 543 500 211 550 572 565 515 490 Send data to Excel '\\ Ema l x o 8 ll I A study of life expectancy showed that a random sample of6 states had a standard deviation of 1.3 deaths per year. Find the 95% confidence intervals of the variance and standard dewation. Assume the variable is normally distributed. Use the chisquare distribution table to find any chi-square values to three deCImal places. Round yourfinal answers to one deCImal place. 6) an I-l-l