At a large university, data were collected on the number of sisters and brothers that each student had. Let the random variable x represent the number of sisters and the random variable y represent the number of brothers. The distribution of x has mean 1. 00 and standard deviation 0. 94. The distribution of y has mean 1. 07 and standard deviation 1. 4. What is the mean of the distribution of x+y ?.

Dangers of publicizing casual conclusion that maybe correlated

Two technicians are discussing how to test a car's exhaust by holding a small piece of paper within an inch of the tailpipe mouth. technician a says that if the paper is vibrating due to a "puffing" output from the tailpipe, this signals a smoothly running engine. technician b says that if the paper is being drawn toward the tailpipe, this could indicate burned exhaust valves. who is correct? a. technician b b. both technicians a and b c. technician a d. neither technicians a or b

Mount saint helen the great lakes and death valley are physical features of the earth which scientific term describes these features