1. You randomly select and weigh 30 samples of an allergy medicine. The sample standard deviation is 1.20 milligrams. Assuming the weights are normally distributed, construct 99% confidence intervals...

1. You randomly select and weigh 30 samples of an allergy medicine. The sample standard deviation is 1.20 milligrams. Assuming the weights are normally distributed, construct 99% confidence intervals for the population variance and standard deviation.

2. Find the 90% and 95% confidence intervals for the population variance and standard deviation of the medicine weights.

a. Find the critical values x2R and x2L for each confidence interval.

b. Use n, s, x2R , and x2L to find the left and right endpoints for each confidence interval for the population variance.

c. Find the square roots of the endpoints of each confidence interval.

d. Specify the 90% and 95% confidence intervals for the population variance and standard deviation.