In the following table, individuals are cross-classified by their age group and income level. Which of the following is the estimated joint probability for the "low income and 21-35 age group" cell?
A) 0.0830
B) 0.0874
C) 0.0996
D) 0.1328

Question

In the following table, individuals are cross-classified by their age group and income level.  Which of the following is the estimated joint probability for the "low income and 21-35 age group" cell?
A) 0.0830 
B) 0.0874 
C) 0.0996 
D) 0.1328

Quizplus · Accepted Answer

To find the estimated joint probability for the "low income and 21-35 age group" cell, we need to look at the intersection of the row and column for that cell. The total number of individuals in the table is 500, so the estimated joint probability is the frequency for that cell divided by 500. Looking at the table, we see that the frequency for the "low income and 21-35 age group" cell is 50. So, the estimated joint probability is 50/500 = 0.0996, which is answer choice C.

In the Following Table, Individuals Are Cross-Classified by Their Age