refer below

Question

5. For the data presented below, answer the questions that follow.

scores=

 

individual       Politictical test    Current event

1                        24.                       23

2.                       16.                       12

3.                       11.                       11

4.                        9.                         6

5.                        8.                        13

6.                       14.                       11

7.                       17.                       16

8                        19.                       16

9.                       21.                       21

10.                     25.                       25

11.                     18.                       11

12.                     13.                       13

13.                     11.                       14

14.                      6.                        10

15.                      9.                        10

16.                     12.                        7

a.    Construct a scatterplot.

 

 

b. Draw a regression line through the data point that “fits” the data points reasonably well.

 

 

c. Enclose the data points with a ellipse.

 

 

d. Estimate the direction of the correlation.

 

 

 

e. Estimate the strength of the correlation coefficient.

 

 

 

f. Now, use only the data points associated with current event scores of 15 and lower and indicate the effects this has on the direction and strength of the correlation coefficient.

 

 

 

g. Explain why this is the case.

 

 

 

h. Explain in words what a non-truncated scatterplot means.

 

 

 

i. Identify how likely it is that a causal relationship has been indicated.

Answer 1

Hello there Sheila!  Can you double check your problem?  I see that you have one line of data, but I think you meant to show it a different way... before anyone can help you, could you tell us if this is what you meant? (See below)

 

Individual                              1   2   3   4   5   6   7   8   9   10  11  12  13  14  15  16

Political Awareness Test    24 16 11  9   8   14 17 19 21  25  18  13  11  6    9   12

Current Events Test            23 12 11  6   13 11 16 16 21  25  11  13  14  10  10  7