Binomial Distribution Homework: Equations and Solutions

AI Thread Summary
The discussion revolves around solving a binomial distribution homework problem, specifically focusing on the conditional probability and the expected value given a condition. The key equation discussed is the formula for f(k), which represents the probability of a certain outcome given that another condition is met. Participants are seeking assistance in deriving this formula and understanding the expected value E(X | X ≥ 2). Additionally, there is a query about expressing the standard deviation σ in terms of n and p. The thread emphasizes the need for clarity in applying binomial distribution concepts to solve the problem effectively.
planauts
Messages
86
Reaction score
0

Homework Statement


http://puu.sh/epl6
Answer
http://puu.sh/eplm


Homework Equations





The Attempt at a Solution


No clue on how to attempt this problem. Any help would be appreciated, thanks!
 
Last edited by a moderator:
Physics news on Phys.org
planauts said:

Homework Statement


http://puu.sh/epl6
Answer
http://puu.sh/eplm


Homework Equations





The Attempt at a Solution


No clue on how to attempt this problem. Any help would be appreciated, thanks!

(a) What is the formula for f(k) \equiv \Pr\{X = k|X \geq 2 \}, for k = 2, 3, ...,n? Then E(X | X \geq 2) = \sum_{k=2}^n k f(k), and you ought to be able to get the cited formula from this.
(b) What is the formula for σ in terms of n and p? Look at it carefully.

RGV
 
Last edited by a moderator:

Thread 'Family of lines that are at a distance of 5 from the origin'

I picked up this problem from the Schaum's series book titled "College Mathematics" by Ayres/Schmidt. It is a solved problem in the book. But what surprised me was that the solution to this problem was given in one line without any explanation. I could, therefore, not understand how the given one-line solution was reached. The one-line solution in the book says: The equation is ##x \cos{\omega} +y \sin{\omega} - 5 = 0##, ##\omega## being the parameter. From my side, the only thing I could...
View full post »

Similar threads

Self review: Statistics - Binomial Distribution
Replies
5
Views
3K
Use of binomial theorem in a sum of binomial coefficients?
Replies
1
Views
2K
Poisson, Binomial Distributions
Replies
1
Views
2K
Binomial Distribution Practice: Part A Solution & Part B Explanation
Replies
2
Views
1K
Poisson vs Binomial approaches yield different results
Replies
2
Views
2K
Poisson Distribution -- Rental of a number of television sets
Replies
13
Views
2K
Solve Binomial Theorem Homework: Find Coefficients of Degree 17 & x7
Replies
15
Views
2K
What Is the Probability That Exactly 3 Out of 8 Children Are Girls?
Replies
2
Views
2K
Binomial Distribution: Finding Probability with Trials, Success, and X Value
Replies
5
Views
2K
What Is the Probability Distribution Function After Four Steps in a Random Walk?
Replies
10
Views
3K

Hot Threads

Recent Insights

Back
Top