unit 11 assessment - scatter plots and data

1. Which is a true statement about two numerical sets of data that have negative association?

• A. As one variable increases, the other variable does not change.

• B. As one variable increases, the other variable increases.

• C. As one variable decreases, the other variable decreases.

• D. As one variable increases, the other variable decreases.

Tags

TEKS.MATH.8.11A

2. What type of association would you expect to see between the amount of fog in the sky and the distance that a pilot can see?

• A. Positive association

• B. Negative association

• C. No association

• D. There is not enough information to tell.

Tags

TEKS.MATH.8.11A

3. Which variables would the scatter plot at the right be most likely to represent?

• A. The number of siblings a person has and the person’s GPA

• B. The number of guests at a hotel and the total water consumption

• C. The total number of miles driven and the total gallons of gas used

• D. The number of people at a concert and the total concession sales

Tags

TEKS.MATH.8.11A

4. Which scatter plot shows both positive and linear association?

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Tags

TEKS.MATH.8.11A

5. Which of the scatter plots below shows a stronger association, and why?

• A. Scatter plot A; its slope is greater than B.

• B. Scatter plot A; its points of data are closer together than B.

• C. Scatter plot B; its slope is positive.

• D. Scatter plot B; it does not have any data points that are outliers.

Tags

TEKS.MATH.8.11A

6. Which equation written in slope-intercept form represents the trend line shown on the scatter plot below?

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Tags

TEKS.MATH.8.4B

7. John and Bob each made a scatter plot to represent the data in the table as shown below. Who made the scatter plot correctly?

• A. John only

• B. Bob only

• C. Both John and Bob

• D. Neither John nor Bob

Tags

TEKS.MATH.8.11A

8. Which of the following is a conclusion that you can make based on the table ?

• A. As the average temperature increases, the snow cone sales increase.

• B. As the average temperature increases, the snow cone sales decrease.

• C. As the average temperature decreases, the snow cone sales increase.

• D. There is no association between the temperature and the number of snow cone sales.

Tags

TEKS.MATH.2A.8C

9. Are there any outliers in the data ?

• A. Yes; Week 10 is an outlier since it is the greatest data point.

• B. Yes; Week 1 is an outlier since it is the lowest data point.

• C. Yes; Week 7 is an outlier since it does not fit the general trend of the data.

• D. No; there are not any outliers in the data.

Tags

TEKS.MATH.S.4C

A scatter plot was made to show the number of homes in a town based on the year. A trend line was drawn on the graph with an equation of y = 84x + 625 where x is the number of years since 1995 and y is the total number of homes in the town.

Predict the number of homes in the town in 2015.

Tags

TEKS.MATH.P.5C