A consumer organization tested two paper shredders, the Piranha and the Crocodile, designed for home use. Each of 10 randomly selected volunteers shredded 100 sheets of paper with the Piranha, and then another sample of 10 randomly selected volunteers shredded 100 sheets with the Crocodile. The Piranha took an average of 200 seconds to shred 100 sheets of paper with a standard deviation of 7 seconds. The Crocodile took an average of 187 seconds to shred 100 sheets with a standard deviation of 6 seconds.

A. Construct a 98% confidence interval for the difference between the two population means

Confidence Interval: (________ , ________ )

B. Using the 2% significance level, can you conclude that the mean time taken by the Piranha to shred 100 sheets is greater than that for the Crocodile?

Given the above information, we conclude that _____________________________ .