Question 289808
The Pill HCI Penylpropanolamine contans in each tablet an over the counter diet 
pill medicaion with a normal distribtion mean of 75mg and a standard deviation 
of 0.7mg
What is the probabilty that a randomly selected tablet contains:
-at least 76mg of phenylpropanolamin?
z(76) = (76-75)/0.7 = 1.42857
P(x >= 76) = P(z >= 1.42857) = 0.0766
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-less than 73mg of phenylpropanolamin?
z(73) = (73-75)/0.7 = -2.8571
P(x <= 73) = P(z <= -2.8571) = 0.0021
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Cheers,
Stan H.