SOLUTION: Cellphone This Year Yes No Total Own a comput Yes 37 8 45 No 38 17 55 Total 75 25 100 a. Find t

Question 782440: Cellphone This Year
Yes No Total
Own a comput Yes 37 8 45
No 38 17 55
Total 75 25 100
a. Find the probability a randomly selected family has a cell phone.

b. Find the probability a randomly selected family has a cell phone, given that they own a computer.
c. Are the events of owning a computer and having a cell phone independent or dependent events?

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Cellphone This Year
Yes No Total
Own a comput Yes 37 8 45
No 38 17 55
Total 75 25 100
a. Find the probability a randomly selected family has a cell phone.
Ans: 75/100
-------------
b. Find the probability a randomly selected family has a cell phone, given that they own a computer.
Ans: 37/46
-------------
c. Are the events of owning a computer and having a cell phone independent or dependent events?
Check:: P(have cell)*P(own computer) = P(have cell and own computer)
(75/100)(37/100) = 37/100
That is false.
So those events are dependent.
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Cheers,
Stan H.
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