Probability - Independent events with minimal points in sample space

Click For Summary
SUMMARY

The minimum number of points required in a sample space to ensure the existence of n independent events A_1, ..., A_n, each with non-zero and non-one probabilities, is determined by the relationship between subsets and the size of the sample space. Specifically, a set of size n generates 2^n subsets. To achieve at least n+2 subsets, the sample space must contain at least ⌈log2(n+2)⌉ elements. This establishes a foundational understanding of independence in probability theory.

PREREQUISITES
  • Understanding of probability theory, specifically independent events.
  • Familiarity with sample spaces and their properties.
  • Basic knowledge of logarithmic functions and their applications.
  • Concept of subsets in set theory.
NEXT STEPS
  • Research the concept of independent events in probability theory.
  • Study the properties of sample spaces and their implications on event independence.
  • Learn about the relationship between subsets and set size in combinatorics.
  • Explore logarithmic functions and their applications in probability calculations.
USEFUL FOR

Students studying probability theory, educators teaching statistics, and mathematicians interested in the foundational aspects of independent events and sample spaces.

nrush
Messages
1
Reaction score
0

Homework Statement


What is the minimum number of points a sample space must contain in order that there exists n independent events A_1, ..., A_n , none of which has probability zero or one?

Homework Equations


None at this time

The Attempt at a Solution


I was thinking that if each A_i consisted of one point in the sample space, that then they would all be independent. But it seems that this is definitely not the minimum number of points. Any hints at this would be greatly appreciated.

Thanks!
 
Physics news on Phys.org
Hmmm. A set of size n has ##2^n## subsets, counting the empty subset and the whole set. So if you want ##n+2## subsets you need ##\ln_2(n+2)##, rounded up to an integer, elements in the set. Whether or not you can make them independent is another question.
 

Similar threads

  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 13 ·
Replies
13
Views
3K
Replies
2
Views
1K
  • · Replies 8 ·
Replies
8
Views
2K