THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING:
On average,you receive 2.6 pieces of junk mail a day.Assume that the number of pieces of junk mail you receive each day follows the Poisson distribution.
-What is the standard deviation of the number of pieces of junk mail you receive daily?
A)1.61
B)2.60
C)6.76
D)There is not sufficient information to determine this.

Question

Quizplus · Accepted Answer

The standard deviation of a Poisson distribution is the square root of its mean ($\lambda$), which in this case is 2.6. Therefore, the standard deviation is $\sqrt{2.6} \approx 1.61$.