What is the expected value of X, E(X)? Round to the nearest tenths/first decimal place, x.x

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Chapter1: Starting With Matlab
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What is the expected value of X, E(X)?

Round to the nearest tenths/first decimal place, x.x 

Analyzing historical data, you found that the probability that a person clicks on the online ad of your
company is 0.22 or 22% (a person either clicks or does not click on your ad).
Let X be the number of independent people who view the ad until someone clicks on it (including
the person who clicked on the ad, so if we say X=5, that means it took 5 people to look at the ad to
get one to click on the ad).
Say you show the ad to 20 independent people. Let Y be the number of people who click on the ad
among the 20 independent people who view the ad.
Let Z be whether a single person who views the ad clicks on it or does not click on it.
Transcribed Image Text:Analyzing historical data, you found that the probability that a person clicks on the online ad of your company is 0.22 or 22% (a person either clicks or does not click on your ad). Let X be the number of independent people who view the ad until someone clicks on it (including the person who clicked on the ad, so if we say X=5, that means it took 5 people to look at the ad to get one to click on the ad). Say you show the ad to 20 independent people. Let Y be the number of people who click on the ad among the 20 independent people who view the ad. Let Z be whether a single person who views the ad clicks on it or does not click on it.
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