Question

Question 1:

Cigarettes Per Day (X) X² Infant Birth Weight (Y) Y² XY

2                                                    4                                      7.7 59.29                    15.4

6                                                       36                                      7.3                      53.29                     43.8

9                                                       81                                      6.9                      47.61                     62.1

11                                                    121                                   6.4                      40.96                     70.4

∑X = 28                                    ∑X² = 242                           ∑Y = 28.3 ∑Y² = 201.15 ∑XY = 191.7

What is S_y (the standard deviation of Y)? In other words, the square root of the variance of Y.

		15.33
		0.31
		3.92
		0.56

Answer 1

TOPIC:Standard deviation.