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Binomial Mean & Standard Deviation. Section 6.3C. It is estimated that 28% of all students enjoy math. If 30 people are selected at random, find the probability that. exactly 18 enjoy math. at least 24 enjoy math. Between 17 and 28 enjoy math . Mean.
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Binomial Mean & Standard Deviation Section 6.3C
It is estimated that 28% of all students enjoy math. If 30 people are selected at random, find the probability that • exactly 18 enjoy math. • at least 24 enjoy math. • Between 17 and 28 enjoy math.
Mean • If 90% of all people between the ages of 30 and 50 drive a car. Find the mean number (expected #) who drive in a sample of 40.
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A batter has a 0.295 chance of getting a hit. Find the following probabilities: *doesn’t get a hit until his fourth time at bat *Gets his first hit on one of his first three times at bat *Doesn’t get a hit until after his third attempt
The Probability that a person is colorblind is 8%. Find the probability that a colorblind person .. *is found on the sixth interview *is found before the second interview Is found among the first four interview Is found after four interviews.
Geometric Mean • If Y is a geometric random variable with probability of success p on each trial, then its mean (expected value) is . • That is, the expected number of trials required to get the first success is .
Suppose you roll a pair of fair, six-sided dice until you get doubles. Let T = the number of rolls it takes. • Find the probability that we roll doubles on the 3rd roll. • In the game of Monopoly, a player can get out of jail free by rolling doubles within 3 turns. Find the probability that this happens. • What is the expected number of trials required to get doubles?
Homework • Worksheet