PRC-2 · Chapter 11 · Question 16 of 60
Which of the following is a mandatory mathematical requirement for any valid discrete probability distribution?
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: B) The sum of all individual probabilities across the sample space must strictly equal 1.
Explanation
A core axiom of probability distributions is that the sum of the probabilities of all mutually exclusive and collectively exhaustive outcomes must equal exactly 1.0.
More Probability Concepts MCQs
- Q18In the context of a discrete probability distribution, the 'Expected Value' (E[X]) is mathematically synonymous with:
- Q19Which specific probability distribution is strictly characterized by having only two possible outcomes per trial (e.g., success or failure)?
- Q20Which of the following describes the shape of a perfectly normal distribution curve?
- Q21In a perfectly symmetrical Normal Distribution, what specific percentage of observations theoretically fall within ±1 Standard Deviation…
- Q22What are the specific parameters (Mean and Standard Deviation) of a 'Standard Normal Distribution'?