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Lecture 6

Week 6.docx

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Department
Statistics
Course
STAT 200
Professor
Andrew Wiesner
Semester
Spring

Description
9/28/10 Week 6 Continuous Probability Continuous Random Variable­ the normal random variable Bell shaped, empirical rule 68% of observations were within 1 standard deviation of the mean 95% of the observations were within 2 standard deviations of the mean 99.7% of the observations were within 3 standard deviations of the mean Normal Distribution is a special bell shape where we can use table A1 to find probabilities after  converting some observed score to a z score Z score formula: observed ­ mean/ standard deviation Z score­ the number of standard deviation an observation falls from the mean Work of off the mean  Ex. MCAT out of 45 hypothetically mean is 35 with standard deviation of 3 and is adjusted to follow  a normal distribution or approximately more. You want to get into University of North Carolina at Chapel Hill and they look for students who  score 40 or higher on MCAT. What is the probability of you scor
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