Information Subject X Y 1 13 15 2 13 15 3 15 11 4 26 34 5 17

Information

       Subject                 X                                Y

          1                      13                                15

          2                      13                                15

          3                      15                                11

          4                      26                                34

          5                      17                                28

          6                      16                                22

Use above Data for problems 19 to 30

Question 19 (1 point)

N =

Question 19 options:

12

16

6

14

Question 20 (1 point)

df =

Question 20 options:

4

6

15

14

Question 21 (1 point)

With an alpha level of .05 and a two-tail test, what would be a significant correlation coefficient for the above scores (what is the critical value)?

Question 21 options:

.707

.8114

.7067

.5324

Question 22 (1 point)

X =

Question 22 options:

100

36

1860

0

Question 23 (1 point)

X² =

Question 23 options:

1784

10,001

12100

0

Question 24 (1 point)

XY =

Question 24 options:

12,500

2267

1078

2139

Question 25 (1 point)

Y² =

Question 25 options:

2718

17956

15625

2995

Question 26 (1 point)

Y =

Question 26 options:

0

2418

521

125

Question 27 (1 point)

the standard deviation of X, or: s.d._x=

Question 27 options:

4.84

7.05

4.42

49.70

Question 28 (1 point)

standard deviation of y, or sd_y=

Question 28 options:

59.14

8.84

8.07

8.22

Question 29 (1 point)

r =

Question 29 options:

.65

1.23

.86

.74

Question 30 (1 point)

Is the correlation coefficient for the above data statistically significant?

Question 30 options:

Yes

No

Can\'t be determined from the information given

	12
	16
	6
	14

Solution

Consider the table:

19.

N = 6 here, the number of data points.

20.

df = N - 2 = 4

21.

Using a table, at df = 4, 0.05 level,

rcrit = 0.8114

22.

From the table,

Sum(X) = 100

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X	Y	X^2	Y^2	XY
13	15	169	225	195
13	15	169	225	195
15	11	225	121	165
26	34	676	1156	884
17	28	289	784	476
16	22	256	484	352
100	125	1784	2995	2267