Assignment:
Using the normal distribution, response the following questions.
Q1. A pharmaceutical drug has mean effective duration of 10.4 hours with a standard deviation of two hours. In what percentage of the patients will the effectiveness of the drug be:
a) Greater than 13 hours?
b) At least 9 hours?
c) Between 11.8 and 14.6 hours?
Q2. The number of new prescriptions per month for Plavix is normally distributed with a mean of 21000 and a standard deviation of 4750.
a) What is the probability that there will be more than 24000 new prescriptions?
b) What is the probability that the number of new prescriptions per month will be between 22,000 and 24,000?
c) In a sample of 30 months, what is the probability that the number of new prescriptions will be less than 21500?