A food bank investigates if the number of times their donors walk by a homeless person each week impacts donors’ charitable contribution to the food bank. The data are presented below in standard form. # of homeless people seen each week Donation to food bank Donor ZX ZY 1 -1.3 0.36 2 0.64 -0.09 3 -1.1 1.26 4 -0.14 0.14 5 1.41 -0.54 6 -0.52 -0.09 7 1.03 -1.9 8 0.64 -0.99 9 0.83 0.36 10 -1.49 1.49 What does ΣZXZY equal? A) 941 B) 7.86 C) -7.16 D) -4.44 What is the correlation (Pearson’s r) between the number of homeless people donors see each week and their donation to the food bank (rounded to 2 decimal places)? A) .98 B) -.80 C) .72 D) -.56 What is the obtained t-value for this r? A) -2.96 B) -16.35 C) -3.72 D) -1.89 What are the degrees of freedom? A) 4 B) 20 C) 8 D) 10 What is the critical t-value? A) 3.68 B) 2.31 C) 2.01 D) 3.30 What is your conclusion? A) There is no significant correlation between number of homeless people seen each week and donation to the food bank. B) There is a significant positive correlation between number of homeless people seen each week and donation to the food bank. C) There is a significant negative correlation between number of homeless people seen each week and donation to the food bank. D) There is a significant correlation between number of homeless people seen each week and donation to the food bank, but there is not enough information to identify the direction of correlation.
A food bank investigates if the number of times their donors walk by a homeless person each week impacts donors’ charitable contribution to the food bank. The data are presented below in standard form.
|
|
# of homeless people seen each week |
Donation to food bank |
|
Donor |
ZX |
ZY |
|
1 |
-1.3 |
0.36 |
|
2 |
0.64 |
-0.09 |
|
3 |
-1.1 |
1.26 |
|
4 |
-0.14 |
0.14 |
|
5 |
1.41 |
-0.54 |
|
6 |
-0.52 |
-0.09 |
|
7 |
1.03 |
-1.9 |
|
8 |
0.64 |
-0.99 |
|
9 |
0.83 |
0.36 |
|
10 |
-1.49 |
1.49 |
What does ΣZXZY equal?
A) 941
B) 7.86
C) -7.16
D) -4.44
What is the
A) .98
B) -.80
C) .72
D) -.56
What is the obtained t-value for this r?
A) -2.96
B) -16.35
C) -3.72
D) -1.89
What are the degrees of freedom?
A) 4
B) 20
C) 8
D) 10
What is the critical t-value?
A) 3.68
B) 2.31
C) 2.01
D) 3.30
What is your conclusion?
A) There is no significant correlation between number of homeless people seen each week and donation to the food bank.
B) There is a significant
C) There is a significant
D) There is a significant correlation between number of homeless people seen each week and donation to the food bank, but there is not enough information to identify the direction of correlation.
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