Reconsider the data in Exercise 5-89. Suppose that any resistor below 100 ohms is considered defective.

(a) Estimate the fraction of defective resistors produced by each vendor.

(b) Construct a 95% two-sided traditional CI on the difference in the proportion of defective resistors produced by the two vendors.

(c) Construct a 95% two-sided improved CI on the difference in the proportion of defective resistors produced by the two vendors.

(d) Compare the two CIs that you found in parts

(b) and (c).