Post Utme Ui 2017 Mathematics Question 14

Practice objective / multiple choice question 14 from the 2017 Post Utme Ui Mathematics examination.

Post Utme Ui 2017 Mathematics Objective / Multiple Choice
Question 14 POST_UTME_UI • 2017 • MATHEMATICS • objective

Find the mean and standard deviation of the random variable X with probability mass function \begin{align*}\(p(x) =\)\begin{cases} \(\frac{1}{3})\) & \text{if } \\()) & \(x = 1\) \(\frac{1}{2}\)) & \text{if } \(x = 2\\() & text{if}\) \(\frac{1}{6}\)\) & text{if } \(x = 3\) \\(text{if}\((x = 3\)\end{cases} \end{align*}.

Answer Options

Correct Answer A. \text{Mean: } 1.5, \text{ Standard Deviation: } 1.1
B. \text{Mean: } 2, \text{ Standard Deviation: } 1.2
C. \text{Mean: } 1, \text{ Standard Deviation: } 1.3
D. \text{Mean: } 2.5, \text{ Standard Deviation: } 1.4
Correct Answer
A
Correct Option:
\text{Mean: } 1.5, \text{ Standard Deviation: } 1.1

About This Question

This is Post Utme Ui 2017 Mathematics Question 14. It is one of the objective questions from the 2017 Post Utme Ui Mathematics examination.

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