The data below comprises of the number of hours (X) studied and the exam grade (Y) obtained for 6 first year students registered at UWC. Calculate the correlation coefficient (rounded off to two decimals). X 2 5 1 2 3 3 Y (%) 60 85 73 80 90 87 SSxy = 42.33 SSx = 9.33 SSy = 618.83 = 2.6667 = 79.1667 b = 4.5357 A. 0.3102 B. 0.5570 C. -0.9865 D. 0.0073

The data below comprises of the number of hours (X) studied and the exam grade (Y) obtained for 6 first year students registered at UWC. Calculate the correlation coefficient (rounded off to two decimals). X 2 5 1 2 3 3 Y (%) 60 85 73 80 90 87 SSxy = 42.33 SSx = 9.33 SSy = 618.83 = 2.6667 = 79.1667 b = 4.5357 A. 0.3102 B. 0.5570 C. -0.9865 D. 0.0073

Calculus For The Life Sciences

2nd Edition

ISBN:9780321964038

Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Chapter1: Functions

Section1.2: The Least Square Line

Problem 7E

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Question

X	2	5	1	2	3	3
Y (%)	60	85	73	80	90	87

SSxy = 42.33	SSx = 9.33	SSy = 618.83	= 2.6667	= 79.1667
b = 4.5357

0.3102

0.5570

-0.9865

0.0073

Definition Definition Relationship between two independent variables. A correlation tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.

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