Below is the probability distribution for random variable x.What is the probability of at least a score of 2 in this distribution?

A) .18
B) .42
C) .60
D) .82

Question

Below is the probability distribution for random variable x.What is the probability of at least a score of 2 in this distribution?

A) .18 
B) .42 
C) .60 
D) .82

Quizplus · Accepted Answer

The probability of at least a score of 2 is the sum of the probabilities of x = 2, x = 3, and x = 4. This is equal to .5 + .2 + .1 = .8, or 80%. Therefore, the correct answer is D, .82.

Below Is the Probability Distribution for Random Variable X