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Statistics help!!!!!!!!!!!!!!!?
A study conducted by Hershey's discovered that Americans consumed on average of 11.4 pounds of chocolate per year. Let's assume that the annual chocolate consumption follows the normal distribution with a standard deviation of 3.6 pounds.
a) What is the probability that a randomly selected person will consume...
1) Less than seven pounds of chocolate next year?
2) More than 9 pounds of chocolate next year?
please help me out and if you could show how you got your answer....thanks in advance!
1 Answer
- M3Lv 78 years agoFavorite Answer
1. z = (7-11.4)/3.6 = -1.22, P(z < -1.22) = .1112 <----
2. z = (9-11.4)/3.6 = -0.67, P(z < -0.67) = .2514 <-----
