A business has six customer service telephone lines Let x denote the number of lines in use at any given time Suppose that the probability distribution of x is as follows a Calculate the mean value and standard deviation of x b What is the probability that the number of lines in use is farther than...

a x x p x 0010 1015 2020 3025 4020 5006 7004 264 x 2 x x ...

A business has six customer service telephone lines. Let x denote the number of lines in use

Question:

A business has six customer service telephone lines. Let x denote the number of lines in use at any given time. Suppose that the probability of x is as follows:

a. Calculate the mean value and standard deviation of x.
b. What is the probability that the number of lines in use is farther than 3 standard deviations from the mean value?

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...