Researchers wish to study fuel consumption rates based on speed. The data from the test car at 10 speeds are below. It can be shown that for these data: = 41.9, = 17.8, = 2352.9, = 267.6, ( - ) = −270.2.
Calculate the sample covariance.
A) −270.2
B) −30.02
C) −27.02
D) −74.58
E) −82.86

Question

Researchers wish to study fuel consumption rates based on speed. The data from the test car at 10 speeds are below.  It can be shown that for these data:  = 41.9,  = 17.8,  = 2352.9,  = 267.6,  (  -  ) = −270.2.
Calculate the sample covariance.
A) −270.2 
B) −30.02 
C) −27.02 
D) −74.58 
E) −82.86

Quizplus · Accepted Answer

s_xy == −270.2 / 9 = −30.02

Researchers Wish to Study Fuel Consumption Rates Based on Speed