Discussion :: Exam Questions Paper
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A discrete random variable X takes values from 1 to 5 with probabilities as shown in the table. A student calculates the mean of X and 3.5 and her teacher calculates the variance of X as 1.5. Which of the following statements is true?
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A.
Both the student and the teacher are right
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B.
Both the student and the teacher are wrong
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C.
Both the student is wrong but the teacher is right
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D.
The student is right but the teacher is wrong
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Answer : Option B
Explanation :
The mean is 3.
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