If you know nothing about a person, the best guess to make about his or her religion is whatever the most common religion is. Always guessing the most common religion, you will make quite a few incorrect guesses. Assume the value of lambda for the relationship between race and religious affiliation is .65. By what proportion could you reduce your number of errors if, before you guess their religious affiliation, you are told their race?
A) .00
B) .35
C) .65
D) 1.00

Question

Quizplus · Accepted Answer

Lambda (λ) is a measure of association that indicates the proportional reduction in error when predicting the value of one variable based on the knowledge of another variable. In this case, a lambda of .65 means that knowing a person's race would reduce the error in guessing their religious affiliation by 65%.

If You Know Nothing About a Person, the Best Guess