The data below is on the number of hours 12 students studied for an econometrics test (X) and the scores they obtained (Y).
ID
Y (Scores)
X (Hrs studied)

1
6
2.
2
4
1
3
4
2
4
3
0
5
4
2.
6
7
3
7
2.
1
8
4
1
9
6
2
10
7
3
11
8
3
12
6
2
You are required to do the following:
1) Replace two of the Y values with integers between 3 and 7; and the corresponding X
values with integers between 1 and 4. Present your new data in your report. (Note: I do
not expect two students to have the same data set)!
2) Calculate the students' average score and average number of hours studied.
3) Calculate the standard deviation of X and Y.