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1 of 8 0-day streak

Validate, complete and normalise a discrete probability distribution

DIFFICULTYintrostandardchallengeexam
QUESTION TYPEMix of allChange
Validate a tableCheck probability bounds in a tableCheck the total of a tableValidate a mass-function ruleValidate a mass-function ruleCheck probability bounds in a mass-function ruleCheck the total of a mass-function ruleNOWMix of allRecommended
Question 1 of 8

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Let \(X\) be a discrete random variable with the stated value set

The table below lists the complete value set and its probabilities

Value of XProbability
\(-5\)\(\frac{1}{4}\)
\(-4\)\(\frac{1}{12}\)
\(0\)\(\frac{2}{3}\)
(a)1 mark

Does this table give a valid probability distribution for X?

(b)1 mark

Which statement gives the reason for your decision?