Question

When a polling company calls a telephone number at random, there is only a 9% chance that the call reaches a live person and the survey is successfully completed. Suppose the random digit dialing machine makes 15 calls. Let X = the number of calls that result in a completed survey.
(a) Calculate and interpret the mean of X.

(b) Calculate and interpret the standard deviation of X​

Answer 1

Answer:

(Part A) I know the mean of x will be 1.35

Step-by-step explanation:

Just do 9 percent of 15, I nessecarly dont know how to do that math but I looked it up and gave me 1.35. and you got the mean. here is the homework my teacher gave me : I hope this helps