A sample of 16 cans of tomato juice showed a standard deviation of 0.4 ounce. A 95% confidence interval estimate of the variance for the population is_____
a. 0.0832 to 03474
b. 0.0873 to 0.3833
c. 0.2183 to 0.9581
d. 0.2080 to 0.8686