study
hours
exam
score
3
75
15
95
6
65
8
70
4
85
2
80
10
65
(a) Use google spreadsheet to get a scatterplot of the data Y against X
(b) Make your best educated guess of the correlation r between X and Y from the scatterplot
(c) Find $\bar{x}$, the mean of the data set X
(d) Find $\sigma_x$, the population standard deviation (SD) of the data set X
(e) Find $\bar{y}$, the mean of the data set Y
(f) Find $\sigma_y$, the population standard deviation (SD) of the data set Y
(g) Find $\sum(x - \bar{x})(y - \bar{y})$
(h) Find $r_A$