Probability Binominal

[Lippi86]

Hi

Having some problems with these, thanksful for help!

Suppose that X~N(10, 1).
a) Find P(X>10)
b) Find P(X=10)
c) Find P (7 < X < 13)
d) Find a such that P(10 - a < X < 10 + a) = 0.95
e) Find a, b such that P (a < X < b) = 0.85 and P(X < a) = 2P (X > b)

 

[tkhunny]

Why are these "binomial"? These are eyeball problems. You must know the properties of the Normal Distribution.

a) 50% - EVERY TIME.
b) 0% - EVERY TIME
c) Do you have an "Emperical Rule"? 99.7%
d) Do you have an "Emperical Rule"? 2

Really, you do the last one. It's the only one that should have caused you to write anything down.