Bivariate Data

Which Scatterplot shows a negative correlation and an outlier?

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Which statement pertaining to the scatterplot is not correct?

• There is a linear association between the variables.

• The data points indicate a strong association.

• There is a positive association between the variables.

• As sleep time increases, the number of quiz errors decreases.

What is the best description of an outlier in a scatterplot?

• An outlier is either the highest point or the lowest point.

• The location of the outlier varies greatly from the overall patter

• The sum of the coordinate of an outlier is great than the sum of the coordinates of any other point.

• The different of the coordinate of an outlier is greater than the difference of the coordinates of any other point.

Eric works in a restaurant. Sometimes he clears tables The scatterplot shows how much he earned in tops by clearing tables on different days. Based on the scatterplot, which is the most likely amount Eric will be earning by clearing 6 tables?

• $6

• $10

• $12

• $14

The scatterplot shows how many hikers reached a mountaintop overlook on different days during the year. Which statement correctly describes the association between temperature and the number of hikers that reached the overlook?

• The association is positive but not linear.

• The association is negative but not linear.

• The association is linear because it is negative.

• The association is neither positive nor negative because it is not linear.

Which statement clearly describes the association between hot chocolate sales and ice cream sales?

• There is a negative association because in general, as hot chocolate sales increase, ice cream sales decrease.

• There is a negative association because in general, as hot chocolate sales increase, ice cream sales increase.

• There is a positive association because in general, as hot chocolate sales increase, ice cream sales decrease.

• There is a positive association because in general, as hot chocolate sales increase, ice cream sales increase.

A baseball coach would like to be able to predict the number of hits his players will get based on the number of times they bat. He graphs some data and determines the line of best fit. The equation of the line of best fit is y = 0.32x – 20.51, where x is the number of times at bat and y is the number of hits. How many hits should he expect from a player who bats 175 times? Round your answer to the nearest whole number.

• 35

• 38

• 76

• 77

What type of correlation is shown in the scatterplot?

• Positive Correlation

• Negative Correlation

• No Correlation

• Undefined Correlation

The data on the graph shows the percent of fatal accidents due to speeding and the ages of the drivers. The line of best fit for the data is shown. Use the line of best fit to predict the age of drivers with 15% fatal accidents due to speeding.

• 30 years

• 48 years

• 36 years

• 42 years

A medical student is conducting a study to track boys’ weights from age 5 to age 18. The student graphs some data and determines the line of best fit is y = 1.73x + 80.13. What does the slope mean in this situation?

• The increase in the number of pounds a boy gains each year.

• The decrease in the number of points a boy gains each year.

• The increase in the number of years for each pound a boy gains.

• The decrease in the number of years for each pound a boy gains.