Question
Suppose certain coins have weights that are normally distributed with a mean of 5.172 g 5.172g and a standard deviation of 0.073 g 0.073g. A
Suppose certain coins have weights that are normally distributed with a mean of 5.172 g
5.172g and a standard deviation of 0.073 g
0.073g. A vending machine is configured to accept those coins with weights between 5.042
5.042 g and 5.302
5.302 g.
a. If 280
280 different coins are inserted into the vendingmachine, what is the expected number of rejectedcoins?
The expected number of rejected coins is :
21. (Round to the nearestinteger.)
b. If 280
280 different coins are inserted into the vendingmachine, what is the probability that the mean falls between the limits of 5.042
5.042 g and 5.302
5.302 g?
The probability is approximately:
0.9998. (Round to four decimal places asneeded.)
PLEASE NOTE THERE ARE TWO QUESTIONS FOR THIS PROBLEM.
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