a) Calculate the mean
The mean is calculated by adding up all of the terms in the data set and dividing that sum by the number of terms in the data set.
2 + 41 + 63 + 20 + 3 + 1 + 5 = 135
135 / 7 = 19.2857
mean = 19.2857 (please round to where you need)
b) Find the new mean
If each data value is increased by 10, that means that the mean is increased by 10. The mean is a non-resistant value, which means that it can be pulled in one way or another by outliers in a data set. And when a number is added to every term in the data set, the mean will also take on that number.
new mean = 29.2857
c) If each data value is doubled, that means the mean will also be doubled. As I said previously, the mean is a non-resistant measure. So if all the data values change in some way, then the mean will change in that same way.
new mean = 38.5714
Hope this helps! :)