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bourbon
Oct 3, 2009, 10:17 PM
A random variable x has this probability distribution:

x 0 1 2 3 4 5
p(x) 0.1 0.3 0.4 0.1 ? 0.05


a. Find p(4)
b. Construct a probability histogram to describe p(x)
c. Find µ, σ(squared), σ
d. Locate interval µ +or- 2σ on the axis of the histogram. What is the probability that x will fall into this interval?
e. If you were to select a very large number of values of x from the population, would most fall into the interval µ +or- 2σ ? Explain.


I really need help, thanks in advance.

amIwrong
Oct 3, 2009, 10:19 PM
Cumulative Normal Distribution: Probability Calculator (http://stattrek.com/Tables/Normal.aspx)

Could this help you at all? There are a variety of "statistical calculators" on line

amIwrong
Oct 3, 2009, 10:21 PM
A good tutoring site is HWFIRM.COM - Online Homework Help (http://www.hwfirm.com/)

bourbon
Oct 4, 2009, 09:18 PM
I have to pay for that site lol... I don't have enough money for what they would want.