Notes Over 12.7 Using a Normal Distribution Area Under a Curve.

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Presentation transcript:

Notes Over 12.7 Using a Normal Distribution Area Under a Curve

Notes Over 12.7 Using a Normal Distribution A normal distribution has a mean of 80 and a standard deviation of 7. Find the probability that a randomly selected x-value is in the given interval. 1. between 66 and 87

Notes Over 12.7 Using a Normal Distribution A normal distribution has a mean of 80 and a standard deviation of 7. Find the probability that a randomly selected x-value is in the given interval. 2. at most 94

Notes Over 12.7 Using a Normal Distribution 2. The waiting time for drive through customers at a certain bank during the busiest hours is normally distributed with a mean of 8 minutes and a standard deviation of 2 minutes. What is the probability that the next two customers will wait longer than 8 minutes?

Notes Over 12.7Finding a Binomial Probability A scientist claims that 18% of all patients with high blood pressure have negative side effects from a certain kind of medicine. There are 120 patients in a random study. 4. What is the probability that you will find at most 30 patients with negative side effects?

Notes Over 12.7 Finding a Binomial Probability A scientist claims that 18% of all patients with high blood pressure have negative side effects from a certain kind of medicine. There are 120 patients in a random study. 5. What is the probability that you will find at least 18 patients with negative side effects?

Notes Over 12.7