In: Statistics and Probability
1. A sample of 20 items provides a sample standard deviation of 5.
a. Compute the 90% confidence interval estimate of the population variance. (2pts)
b. Compute the 95% confidence interval estimate of the population variance.(2pts)
c. Compute the 95% confidence interval estimate of the population Standard Deviation.(2pts)
2. The variance in drug weights is critical in the pharmaceutical industry. For a specific drug, with weights measured in grams, a sample of 18 units provided a sample variance of s2 = 0.36.
a.Construct a 90% confidence interval estimate of the population variance for the weight of this drug.(2pts)
b.Construct a 90% confidence interval estimate of the population standard deviation.(2pts)