Information Subject X Y 1 13 15 2 13 15 3 15 11 4 26 34 5 17 28 6 16 22 Question
ID: 3441191 • Letter: I
Question
Information
Subject X Y
1 13 15
2 13 15
3 15 11
4 26 34
5 17 28
6 16 22
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 sdy=
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
0
2418
521
125
Explanation / Answer
Consider the table:
26.
Sum(y) = 125 [answer]
27.
Using technology to get sdx,
sdx = 4.844240567 = 4.84 [answer]
28.
Using technology to get sdy,
sdy = 8.841191473 = 8.84 [answer]
29.
Using technology to get r,
r = 0.857677153 = 0 .86 [answer]
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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