Find the 90% confidence interval for the variance and standard deviation of the ages of seniors at Oak Park College if a sample of 23 students has a...

Find the 90% confidence interval for the variance and standard deviation of the ages of seniors at Oak Park College if a sample of 23 students has a standard deviation of 2.1 years. Assume the variable is normally distributed. Use the chi-square distribution table to find any chi-square values to three decimal places. round your final answer to one decimal place