Register to reply

Probability Question. Find the probability that F_{X}(x) will be less than 1, etc

by mah062
Tags: probability
Share this thread:
mah062
#1
May7-12, 07:33 PM
P: 3
1) (1 pt) You are investigating a random phenomenon and have determined that the cumulative distribution function F_{X}(x):=P(X<x) of the random variable X has values F_{X}(1)=.5, F_{X}(2)=.74, F_{X}(3)=.92

A) Less than 1 _____

B) Larger than 2 _____

C) Between 1 and 3 _____



2) Equations: None that I know of that pertain to this particular problem.


3) Part A:
0.5+0.74+0.92=2.16

So... 0.5/2.16=0.23148 Or 23.148%

I tried this for each part. I'm looking through my notes but they only have probability questions with equations.
Phys.Org News Partner Science news on Phys.org
Sapphire talk enlivens guesswork over iPhone 6
Geneticists offer clues to better rice, tomato crops
UConn makes 3-D copies of antique instrument parts
Curious3141
#2
May7-12, 08:04 PM
HW Helper
Curious3141's Avatar
P: 2,942
Quote Quote by mah062 View Post
1) (1 pt) You are investigating a random phenomenon and have determined that the cumulative distribution function F_{X}(x):=P(X<x) of the random variable X has values F_{X}(1)=.5, F_{X}(2)=.74, F_{X}(3)=.92

A) Less than 1 _____

B) Larger than 2 _____

C) Between 1 and 3 _____



2) Equations: None that I know of that pertain to this particular problem.


3) Part A:
0.5+0.74+0.92=2.16

So... 0.5/2.16=0.23148 Or 23.148%

I tried this for each part. I'm looking through my notes but they only have probability questions with equations.
You're given the cumulative distribution function (CDF). That gives the probability that X will be LESS than a given value x.

So what does [itex]F_X(1)[/itex] signify? The answer to part a) is immediate.

Can you now figure out the other two parts?
mah062
#3
May11-12, 02:24 PM
P: 3
Solved. Thank you!


Register to reply

Related Discussions
Probability question; Conditional probability and poisson distribution Precalculus Mathematics Homework 1
(NOT A QUESTION) How to find the probability of meeting someone. Set Theory, Logic, Probability, Statistics 1
Please help me to find the probability of this question. Precalculus Mathematics Homework 2
Probability Question About The Poisson Probability Distribution Calculus & Beyond Homework 15
[probability theory] simple question about conditional probability Precalculus Mathematics Homework 1