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3. Find the mean, variance and standard deviation of the following probability distribution. P(x) 1 0.15 0.30 3 0.25 0.30

3. Find the mean, variance and standard deviation of the following probability distribution. P(x) 1 0.15 0.30 3 0.25 0.30

College Algebra
College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....
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pls answer no.3 on paper

1. A small study aims to see the correlation between having a tattoo and cases of clinical depression. In one group of 12 people from the same age bracket, 7 have 1 tattoo, 3 have 2 tattoos, and the rest have 3 tattoos. If a person is randomly picked from this group and evaluated for depression, what is the expected number of tattoos that the person will have. 2. Miguel and Luis are playing a game. Miguel will roll a number cube and Luis will guess the number that comes up. Luis pays Php20.00 to make a guess, and if he guesses correctly, Miguel pays him Php500.00. If Luis makes 5 guesses, how much money is he expected to win? 3. Find the mean, variance and standard deviation of the following probability distribution. P(x) 1 0.15 2 0.30 0.25 4 0.30 3.
Transcribed Image Text:1. A small study aims to see the correlation between having a tattoo and cases of clinical depression. In one group of 12 people from the same age bracket, 7 have 1 tattoo, 3 have 2 tattoos, and the rest have 3 tattoos. If a person is randomly picked from this group and evaluated for depression, what is the expected number of tattoos that the person will have. 2. Miguel and Luis are playing a game. Miguel will roll a number cube and Luis will guess the number that comes up. Luis pays Php20.00 to make a guess, and if he guesses correctly, Miguel pays him Php500.00. If Luis makes 5 guesses, how much money is he expected to win? 3. Find the mean, variance and standard deviation of the following probability distribution. P(x) 1 0.15 2 0.30 0.25 4 0.30 3.
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