In a certain company, every worker received a $50-

Solution 8E

Step1 of 3:

We have company in that every worker recieved a $50 per week raise.

We need to check How does this affect the mean salary? and  The standard deviation of the salaries?

Step2 of 3:

Let be the old salary of workers.

1).Mean of the X is given by:

     Where,

     = Mean

      x = random variable

     N = sample size

         = 3.

     Now,

                  =

                 =

                 =

 ...