Steps on calculating conditional probability
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Does it take more to be removed from an email list than it used to take? A study of 100 large online retailers revealed the following?
Need Three or More Clicks to be removed
years yes No total
2009 39 61 100
2008 7 93 100
A. Given that three or more clicks are needed to removed from an email list, what the probability that this occurred in2009
B. Given that the year 2009 is involved what is the probability that three or more clicks are needed to be removed from an email list ?
C. Explain the difference in the results in (a) and (B)
D. Are needing three or more clicks to be removed from an email list and the years and the years independent?
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Solution Summary
The solution gives detailed steps on calculating conditional probability. All formula and calculations are shown and explained.
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a) P(occured in 2009 given three or more clicks)=39/(39+7)=0.85
b) P(three or more clicks given year 2009)=39/100=0.39
c) The diffrence is that ...
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