# A consumer organization tested two paper shredders, the Piranha and the Crocodile, designed for home use. Each

## Question:

a. Construct a 99% confidence interval for the difference between the two population means.

b. Using a 1% significance level, can you conclude that the mean time taken by the Piranha to shred 100 sheets is higher than that for the Crocodile?

c. What would your decision be in part b if the probability of making a Type I error were zero? Explain.

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## Step by Step Answer:

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