Problem 4 - A random sample of rice prices per kg in the Philippines is shown. Find the 90% confidence interval for the variance and standard deviation for the prices. Assume the variable is normally...

Extracted text: Problem 4 - A random sample of rice prices per kg in the Philippines is shown. Find the 90% confidence interval for the variance and standard deviation for the prices. Assume the variable is normally distributed. 26.69 13.88 75.37 7.50 3.81 53.81 6.94 28.25 40.25 10.87 28.37 12.00 47.50 43.00 13.62 45.12 28.00 60.50 46.12 14.75