A business has six customer service telephone lines Consider the random variable x Number of lines in use at a randomly selected time Suppose that the probability distribution of x is as follows X p x 0 Need Help Submit Answer 1 2 Read It 3 a Calculate the mean value and standard deviation of x Round your standard deviation to four decimal places Hx ox 4 0 05 0 10 0 17 0 41 0 17 0 08 0 02 b What is the probability that the number of lines in use is farther than 3 standard deviations from the mean value Watch It 5 6 Master It PECKSTAT3 6 4 038 MY NOTES PRACTICE ANOTHER 5 4 Points DETAILS The probability distribution of x the number of tires needing replacement on a randomly selected automobile checked at a certain inspection station is given in the following table