AnswersIntegrated Math II FullComparing Measures of Center and Variability

Strength of Correlation Answers

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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
2
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The table shows the shipping costs for items of different values.

Question illustration
A
a weak positive correlation
B
a strong positive correlation
C
a weak negative correlation
D
a strong negative correlation
3

Which graph shows data whose r-value is most likely closest to 0?

A
A graph shows both axes unnumbered. Points show a downward trend.
Option A
B
A graph shows both axes unnumbered. Points show an upward trend.
Option B
C
A graph shows both axes unnumbered. Points show a downward trend.
Option C
D
A graph shows both axes unnumbered. Points are scattered all over the graph.
Option D
4

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.
5

Which r-value represents the most moderate correlation?

A
–0.92
B
–0.18
C
0.56
D
0.83
6

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.
7

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

Question illustration
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.
8

Which best describes the strength of a model with an r-value of 0.29?

A
a weak positive correlation
B
a strong positive correlation
C
a weak negative correlation
D
a strong negative correlation
9

Which relationships would most likely be causal? Select two options.

A
a positive correlation between the number of homework assignments completed and the grade on the exam
B
a positive correlation between the temperature in a canyon in the early spring and the number of snakes seen by hikers
C
a positive correlation between a child’s shoe size and reading speed
D
a negative correlation between the time a glass of ice water sits on the counter and its temperature
E
a positive correlation between the number of students attending football games and the number of games that are won
10

A 2-column table with 4 rows. The first column is labeled x with entries 0, 5, 10, 15. The second column is labeled y with entries 15, 10, 5, 0.

Question illustration
A
1
B
-1
C
5
D
10

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