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.
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.