Solution: We are given the population mean 
Now, in order to find which shift's mean is closest to population mean, we will find the mean of each shift.
The mean of shift 1 is:

The mean of shift 2 is:

The mean of shift 3 is:

The mean of shift 4 is:

We clearly see the mean of shift 2 is close to the population mean. Hence the option B) Shift 2 is correct.
Answer:
What grade is this
Step-by-step explanation:
I can give you the answer but you have to be patient like 30 min
Answer: In math a mean is the simple mathematical average of a set of two or more numbers.