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  3. suppose that random variable x represents the number of units...

Question: suppose that random variable x represents the number of units...

Question details

Suppose that random variable X represents the number of units that college students register per semester.  If X has the following probability mass function, what is the probability that a student registers three units or more per semester? x 1 2 3 4 5 P(x) 0.12 0.21 0.30 0.32 0.05

 

In reference to the probability mass function provided in Question 1, what it the standard deviation of X?

a. 1.100 b. 1.209 c. 3.167 d. 10.030

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