AP Statisticsmediummcq1 pt
The variance of a discrete random variable measures
A.expected squared deviation from the mean
B.the most likely value
C.the largest deviation
D.the probability of success
Explanation
Core Concept
Variance is E of (X minus μ) squared.
Correct Answer
Aexpected squared deviation from the mean
More Unit 4: Probability, Random Variables, and Probability Distributions practice questions
- mediumIn a group, 40 percent are male and 10 percent are left-handed, with the traits independent. The probability a random person is male and lef…
- easyTwo events are independent if knowing one occurred
- easyFor a normal random variable, the probability of being within one standard deviation of the mean is about
- easyThe binomial coefficient 5 choose 2 equals
- easyA spinner lands on red with probability 1/4. In 4 spins, the expected number of reds is
Practice more AP Statistics questions with full explanations
Practice Unit 4: Probability, Random Variables, and Probability Distributions Questions →