AnswersCommon Core Algebra I - MA3109 B-CR 4Q 0.25 credit due 1029 or will be grade of FStrength of Correlation

Strength of Correlation Answers

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1
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Ryan gathered data about the age of the different dogs in his neighborhood and the length of their tails.

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A
It is a weak negative correlation, and it is not likely causal.
B
It is a weak negative correlation, and it is likely causal.
C
It is a strong negative correlation, and it is not likely causal.
D
It is a strong negative correlation, and it is likely causal.
2
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Which r-value represents the most moderate correlation?

A
–0.92
B
–0.18
C
0.56
D
0.83
3

The table shows the time a patient spends at the dentist and the amount of the bill.

Question illustration
A
–0.93
B
–0.27
C
0.27
D
0.93
4

Which r-value represents the strongest correlation?

A
–0.83
B
–0.67
C
0.48
D
0.79
5

Which r–value represents the strongest negative correlation?

A
–0.7
B
–0.22
C
0.38
D
0.9
6

A graph shows the horizontal axis numbered 4 to 16 and the vertical axis numbered 4 to 12. Points and a line show a downward trend.

Question illustration
A
–0.91
B
–0.35
C
0.35
D
0.91
7

Over five different weeks, Maria tracked how much money she spent on dining out and how much money she saved.Amount Spent on Dining Out ($)Amount Saved That Week ($)20150451106095351307580

A
There is a strong negative relationship.
B
There is a strong positive relationship.
C
There is a weak positive relationship.
D
There is little to no linear relationship.
8

Which r-value represents the weakest correlation?

A
–0.75
B
–0.27
C
0.11
D
0.54
9

A financial advisor studies the relationship between the number of missed credit card payments and a person’s credit score. The scatterplot shows points tightly clustered around a downward-sloping line.

A
–0.91
B
–0.18
C
0.24
D
0.87
10

The number of grams of zero-calorie sodium in a restaurant meal is compared to the total number of calories in the meal. The correlation coefficient relating the two variables is 0.74.

A
It is a weak positive correlation, and it is not likely causal.
B
It is a weak positive correlation, and it is likely causal.
C
It is a strong positive correlation,and it is not likely causal.
D
It is a strong positive correlation, and it is likely causal.

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