Question

a)

Refer to the accompanying scatterplot. a. Examine the pattern of all 10 points and subjectively determine whether there appears to be a strong correlation between x and y. b. Find the value of the correlation coofficient r and determine whether there is a linear correlation. c. Remove the point with coordinates (10.1) and find the correlation coefficient r and determine whether there is 10 a linear correlation. d. What do you conclude about the possible effect from a single pair of values? lick here to view a table of critical values for the correlation coefficient Table of Critical Values 950 878 811 875 834 765 12 13 14 15 16 632 .602 576 .553 532 514 497 708 661 641 623

B)

C)

D)

Answer 1

Answer:

a)

The plot pattern shows that there is a strong correlation between x and y.

b)

data:

x	y
1	8
1	9
1	10
2	8
2	9
2	10
3	8
3	9
3	10
10	1

Correlation r= -0.906

There is a strong negative linear correlation

c)

data:

x	y
1	8
1	9
1	10
2	8
2	9
2	10
3	8
3	9
3	10

Correlation r= 0.000

There is no linear correlation.

d)

we conclude that there is possible strong possible effect on correlation by a single pair of values.