This preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: p(x = 0) = What is the probability that at most two dogs react to the shampoo? What is the probability that exactly 1 dog reacts to the drug? MEAN, VARIANCE AND STANDARD DEVIATION OF A BINOMIAL DISTRIBUTION *mean is also called the expected value Mean: μ = E(X) = np Variance: σ 2 = np(1p) = npq The standard deviation, σ , is the square root of the variance. Example 1: Find the mean and Stdev For the dog reaction example, Example 2: The probability of success on a single trial of a binomial experiment is known to be ¼. The random variable X has a mean value of 80. Find the number of trials involved in this experiment and the standard deviation of X. Example 3: The probability that a hunter hits a target is .7. If 8 shots are fired, find the probability that: He will hit the target 4 times. He will hit the target at least once. He will miss the target every time. How many times should he expect to hit the target?...
View
Full
Document
This note was uploaded on 02/15/2009 for the course STAT 2004 taught by Professor Melutz during the Fall '07 term at Virginia Tech.
 Fall '07
 MELutz
 Statistics, Binomial, Probability

Click to edit the document details