Hey there! Sign in to join this conversationNew here? Join for free
x Turn on thread page Beta
    • Thread Starter
    Offline

    3
    ReputationRep:
    Let X be a discrete random variable, and let a be such that p(a)>0. Show that F(a)=P(X<a)+p(a)

    Any help would be appreciated. All that has come to is to try and prove that P(X<a)+p(a)=P(X<=a) and therefore showing the statement (?)
    Offline

    8
    ReputationRep:
    (Original post by Shady778)
    Let X be a discrete random variable, and let a be such that p(a)>0. Show that F(a)=P(X<a)+p(a)

    Any help would be appreciated. All that has come to is to try and prove that P(X<a)+p(a)=P(X<=a) and therefore showing the statement (?)
    Wtf is F? and what is p.
    • Thread Starter
    Offline

    3
    ReputationRep:
    (Original post by Renzhi10122)
    Wtf is F? and what is p.
    We aren't told, that is all that the question tells us.
    Offline

    8
    ReputationRep:
    (Original post by Shady778)
    We aren't told, that is all that the question tells us.
    Post the whole question please. With a pic.
    Offline

    1
    ReputationRep:
    Is this statistics?
    • Thread Starter
    Offline

    3
    ReputationRep:
    (Original post by Miss.Modesty)
    Is this statistics?
    Yes, first year
    • Thread Starter
    Offline

    3
    ReputationRep:
    Name:  image.jpg
Views: 69
Size:  506.4 KBThis is the question(exercise 4.3)
    Offline

    1
    ReputationRep:
    I'm doing it too, I was flicking through our textbook and i realised my teacher skipped that topic :/, because we are finishing off chapter 4 and 6. Sorry I'm no help :8
    • Thread Starter
    Offline

    3
    ReputationRep:
    (Original post by Miss.Modesty)
    I'm doing it too, I was flicking through our textbook and i realised my teacher skipped that topic :/, because we are finishing off chapter 4 and 6. Sorry I'm no help :8
    It's no problem
    • Study Helper
    Offline

    15
    Study Helper
    (Original post by Shady778)
    It's no problem
    What's the definition of F?

    Edit: Or if you're feeling lazy, look on page 50.
    • Thread Starter
    Offline

    3
    ReputationRep:
    (Original post by ghostwalker)
    What's the definition of F?

    Edit: Or if you're feeling lazy, look on page 50.
    Isn't F just the distribution function?
    • Study Helper
    Offline

    15
    Study Helper
    (Original post by Shady778)
    Isn't F just the distribution function?
    Yes.

    So, F(x) = ?

    Edit: Since this isn't gettting anywhere, I suggest you just look at page 50 of the book, it has the working.
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: October 18, 2015
Poll
Do I go to The Streets tomorrow night?
Useful resources

Make your revision easier

Maths

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

Equations

How to use LaTex

Writing equations the easy way

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.