- #1

psycho007

- 1

- 0

what is probability P(x<1.23)

i know that m(t) = e^tx * f(x)

m'(0) = E(X)

and m''(0) , can find the var(x)

should i calculate it using a normal table?

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- Thread starter psycho007
- Start date

- #1

psycho007

- 1

- 0

what is probability P(x<1.23)

i know that m(t) = e^tx * f(x)

m'(0) = E(X)

and m''(0) , can find the var(x)

should i calculate it using a normal table?

- #2

Ray Vickson

Science Advisor

Homework Helper

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what is probability P(x<1.23)

i know that m(t) = e^tx * f(x)

m'(0) = E(X)

and m''(0) , can find the var(x)

should i calculate it using a normal table?

No, m(t) is

Why would you use a normal table when the random variable is very far from normal? You can actually work out explicitly what is the distribution by expanding out the power and collecting terms in e^(kt) for k = 0,1,2,3,4,5.

RGV

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