Information Subject X Y 1 13 15 2 13 15 3 15 11 4 26 34 5 17 28 6 16 22 Question
ID: 3441189 • 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 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 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
1784
10,001
12100
0
Explanation / Answer
Consider the table:
23.
From the table,
Sum(x^2) = 1784 [answer]
24.
Sum(xy) = 2267
25.
sum(y^2) = 2995
26.
Using technology to get the standard deviation of x,
s.d.x = 4.844240567 [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