Urn Model: set up prob. dist., compute mean, variance

G

Guest

Guest
An urn contains 4 red balls and 4 white balls. An experiment consists of selecting at random a sample of 4 balls and recording the number of red balls in the sample.

Set up the probability distribution and compute its mean and variance.

I know what a probablity distribution is. Can someone please how to calculate a probability and I can calculate the rest.

Also I know "mean = total * probability of success =" what numbers exactly?

"variance = SQRT(total*sucsess * failure) =" what numbers exactly?
 
What are your possible outcomes? 0, 1, 2, 3, 4
What are the probabilities of those outcomes? Hint: Selection Without Replacement
 
You must log in or register to reply here.
Top