Question

1) Draw a scatter diagram of the data by hand, compute the correlation coefficient r, then determine the type of linear relation between x and y for each example:

x	2	3	5	6	6
y	10	9	7	4	2

b)

Height (inches)	Head Circumference (inches)
27.75	17.5
24.5	17.1
25.5	17.1
26	17.3
25	16.9
27.75	17.6
26.5	17.3
27	17.5
26.75	17.3
26.75	17.5
27.5	17.5

c)

Total Length of American black bear (cm)	Weight of American black bear (kg)
139.0	110
138.0	60
139.0	90
120.5	60
149.0	85
141.0	100
150.0	85
166.0	155
151.5	140
129.5	105
150.0	110

Answer 1

1)

correlation coefficient ,    r = -0.9334
NEGATIVE, STRONG RELATIONSHIP

..........

2)

correlation coefficient ,    r =   0.9111

STRONG POSITIVE RELATIONSHIP

................

3)

correlation coefficient ,    r =   0.7031

POSITIVE AND MODERATE RELATIONSHIP

...................

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