Let the random variable X be the outcome of rolling a 6-sided die. Assuming the die is fair, the probability distribution is as
follows: X 1 2 3 4 5 6 Probability 1/6 1/6 1/6 1/6 1/6 1/6 Using the above table to answer the question: What is the mean of X?
2 answers:
Answer: The mean is 3.5
Step-by-step explanation: For a discrete random variable probability, the mean is given by the formula: μ = ∑xiPi, where:
xi is the outcome and Pi is its probability.
In this case,
μ = 1.
+ 2·
+ 3·
+ 4.
+ 5.
+ 6.
μ = 
μ =
μ = 3.5
Thus, the mean of X is 3.5
The answer would be 1.
1/6 + 1/6 + 1/6 + 1/6 + 1/6 + 1/6 = 6.
Divide by 6 and you have 1 for the answer.
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