Statistics - difference between joint distribution and joint density?

Click For Summary
SUMMARY

The discussion clarifies the distinction between joint distribution functions and joint density functions. Joint density functions apply specifically to continuous random variables, while joint distribution functions pertain to discrete random variables. The terms probability density function (PDF) and probability mass function (PMF) are used to differentiate between these two types of distributions. Both serve as examples of distributions in probability theory.

PREREQUISITES
  • Understanding of probability theory concepts
  • Familiarity with random variables
  • Knowledge of probability density functions (PDFs)
  • Knowledge of probability mass functions (PMFs)
NEXT STEPS
  • Research the properties of joint probability distributions
  • Study the applications of joint density functions in statistics
  • Learn about the Central Limit Theorem and its relation to joint distributions
  • Explore the differences between continuous and discrete random variables
USEFUL FOR

Students, statisticians, and data scientists seeking to deepen their understanding of probability distributions and their applications in statistical analysis.

Kuma
Messages
129
Reaction score
0

Homework Statement



This is just a general question about understanding.

What is the difference between a joint distribution functions vs. a joint density function.


Homework Equations





The Attempt at a Solution



Are joint density functions basically the joint distributions of continuous Random variables and joint distribution pertain to discrete random variables?
 
Physics news on Phys.org
Question: A clock's minute hand has length 4 and its hour hand has length 3. What is the distance between the tips at the moment when it is increasing most rapidly?(Putnam Exam Question) Answer: Making assumption that both the hands moves at constant angular velocities, the answer is ## \sqrt{7} .## But don't you think this assumption is somewhat doubtful and wrong?

Similar threads

  • · Replies 2 ·
Replies
2
Views
1K
  • · Replies 11 ·
Replies
11
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
Replies
2
Views
2K
  • · Replies 1 ·
Replies
1
Views
5K
  • · Replies 30 ·
2
Replies
30
Views
4K
  • · Replies 3 ·
Replies
3
Views
3K