I am lost on this assignment and need help can someone do this step by step so I won’t fail this class 1. A set of data consists of the following scores:
7 3 9 5 4
For these data, find the values for:

a. ∑X2 b. ( ∑ X)2 c. ∑ X2 + 5

2. Summation notation for two variables.
The following data consists of pairs of scores ( X and Y ) for four individuals.

X Y

5 8
2 10
3 11
7 2
Determine the values of the following expressions:

A. ∑ X Y B. ∑(X)( ∑Y)