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1. |
Consider the scatter plot below. Which statement is not true about this scatter plot? |
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A. |
As the values of x increase, the values of y increase. |
B. |
There appears to be a negative relationship. |
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C. |
If a line was drawn approximately through the points on the scatter plot, the line would have a positive slope. |
D. |
There appears to be a positive relationship. |
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Hint |
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2. |
If a line is drawn through points on a scatter plot and a negative relationship is shown, then _____. |
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A. |
the slope of the line is undefined. |
B. |
as the values of x increase, the values of y increase |
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C. |
the slope of the line is 0 |
D. |
as the values of x increase, the values of y decrease |
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Hint |
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3. |
Which situation would result in a scatter plot that shows no relationship? |
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A. |
size of house and value |
B. |
length of automobile trip and gasoline consumed by vehicle |
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C. |
age and taxes paid over lifetime |
D. |
age of the head of the household and last digit of phone number |
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Hint |
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4. |
If a line is drawn through points on a scatter plot and a positive relationship is shown, then _____. |
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A. |
the slope of the line is 0 |
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B. |
the slope of the line is undefined. |
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C. |
as the values of x increase, the values of y decrease |
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D. |
as the values of x increase, the values of y increase |
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Hint |
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5. |
The scatter plot shows the relationship between number of weekly meals at fast food restaurants and blood cholesterol level for 25 adults in a correlational study. Describe the independent and dependent variables of the graph and what the graph indicates. |
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A. |
The independent variable is the number of meals per week at a fast food restaurant. The dependent variable is blood cholesterol level. In the study, people who ate more often at fast food restaurants generally had higher blood cholesterol levels. |
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B. |
The independent variable is blood cholesterol level. The dependent variable is the number of meals per week at a fast food restaurant. In the study, people who ate more often at fast food restaurants generally had lower blood cholesterol levels. |
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C. |
The independent variable is blood cholesterol level. The dependent variable is the number of meals per week at a fast food restaurant. In the study, people who ate more often at fast food restaurants generally had higher blood cholesterol levels. |
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D. |
The independent variable is the number of meals per week at a fast food restaurant. The dependent variable is blood cholesterol level. In the study, people who ate more often at fast food restaurants generally had lower blood cholesterol levels. |
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Hint |
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