4. Course B:
study
hours
exam
score
4
70
12
98
9
85
6
80
2
65
3
75
10
92
(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 σx, the population standard deviation (SD) of the data set X
(e) Find $\bar{y}$, the mean of the data set Y
(f) Find σy, the population standard deviation (SD) of the data set Y
(g) Find ∑(x - $\bar{x}$)(y - $\bar{y}$)
(h) Find rB