Two identical footballs, one air- lled and one helium- lled, were used outdoors on a windless day at the University of Tennessee's athletic complex,...

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Difference

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(a) If you make a histogram of the difference with the information above can you use the t-distribution?

Why or why not?

(b) Conduct a hypothesis test to see if the distance traveled by the air-filled football is significantly

less than the distance traveled by the helium-filled football at a 1% level of significances. Show all

steps and interpret.