In a certain company, every worker received a $50-per-week raise. How does this affect the mean salary? The standard deviation of the salaries?
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:
x = random variable
N = sample size
Hence, = .
Therefore, the mean salary is raised by $50.
Step3 of 3:
2). Standard deviation of X is given by:
Therefore, standard deviation will be same.