To compare the braking distances for two types of tires, a safety engineer conducts 35 braking tests for each type. The mean braking distance for Type A is 42 feet. Assume the population standard deviation is 4.7 feet. The mean braking distance for Type B is 45 feet. Assume the population standard deviation is 4.3 feet. At a = 0.10, can the engineer support the claim that the mean braking distances are different for the two types of tires?

Q: Cant see step 2

A: To find:- Factor of -35  that have sum of -2

Q: REWRITE

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Q: Would you please explain step 2?

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