SOLUTION: If x={10, 20, 30, 40} and p(10)=0.30, p(20)=0.30, p(30)=0.30 and p(40)=0.30, can distribution of the random variable x be considered a probability distribution? yes no not en

Algebra ->  Probability-and-statistics -> SOLUTION: If x={10, 20, 30, 40} and p(10)=0.30, p(20)=0.30, p(30)=0.30 and p(40)=0.30, can distribution of the random variable x be considered a probability distribution? yes no not en      Log On


   

Question 1077434: If x={10, 20, 30, 40} and p(10)=0.30, p(20)=0.30, p(30)=0.30 and p(40)=0.30, can distribution of the random variable x be considered a probability distribution?
yes
no
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too much information
Answer by jim_thompson5910(35256) About Me  (Show Source):
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Answer: Choice B) no

Add up the probability values: 0.30+0.30+0.30+0.30 = 1.20

The sum is NOT equal to 1, so this is NOT a probability distribution. The sum of all the probabilities must be equal to 1.