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Statistic Homework Help!!?

Digital Cameras Discussion

Statistic Homework Help!!?

Postby Stephano » Fri Sep 29, 2017 11:11 am

Let X denote the number of Canon digital cameras sold during a particular week by a certain store. The pmf of X is as follows.

x 0 1 2 3 4

px(x) 0.1 0.2 0.3 0.29 0.11

The probability that a particular customer buys an extended warranty given they purchase a camera is 0.60. Let Y denote the number of purchasers during this week who buy an extended warranty. (Give answers accurate to 3 decimal places.)

(a) What is P(X = 4, Y = 2)?

This probability equals P(Y = 2 | X = 4) * P(X = 4); now think of the four purchases as four trials of a binomial experiment, with success on a trial corresponding to buying an extended warranty.

(b) Determine the joint pmf of X and Y:

How to compute P(X=2 & Y=1) & P(X=3 & Y=2)??

Super needed!!! Thanks!!!
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Joined: Tue Mar 11, 2014 7:28 pm

Statistic Homework Help!!?

Postby Beatie » Mon Oct 02, 2017 9:38 am

I cant tell you what the answer is but try making the numbers something you can count. pencils, shoes, something like that. It always helps me.
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Joined: Fri Mar 07, 2014 6:18 pm

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