An employee is selected from a staff of 10 to supervise a certain project by selecting a tag at random from a box containing 10 tags numbered from 1 to 10. Find the formula for the probability distribution of X representing the number on the tag that is drawn.
Find the mean and variance of the random variable X
An employee is selected from a staff of 10 to supervise a certain project by selecting a tag at random from a box containing 10 tags numbered from 1 to 10. Find the formula for the probability distribution of X representing the number on the tag that is drawn.
Find the mean and variance of the random variable X
Let random variable X represent the number of the drawn tag. Since the simple space consists of 10 equally likely events
thus the formula for probability distribution
The mean:
Variance:
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