Two-Way Tables
Linear Models (Equations)
Residuals
Correlation Coefficient
100
According to the table, how many people like snowmobiles and skateboards?
What is 80.
100
Given the scatter plot and the equation, what does the y-intercept mean in this context?
The amount of batter life before spending any time on phone
100
How do you determine the value of a residual?
What is actual value - estimated value
100
The variable that represents the strength of the correlation of a scatter plot
What is "r".
200
Using the table, what percent of people who like skateboards do not like snowmobiles?
What is 36%
200
Given the scatter plot and the linear equation, what does the slope mean in this context?
As the time spent on the phone increases by 1 hour, the amount of battery life decrease by 3/4 of an hour.
200
How do you determine the estimated value?
What is use the equation for the line of best fit
200
The value of r that represents a perfect positive correlation.
What is 1.
300
According to the table, how many people were surveyed?
What is 269
300
What is the equation for the line of best fit?
What is y = 1/3x + 2
300
An actual value is given in a scatter plot as (5, -11.5). An equation for a linear model is y=-3x + 2.5. What is the residual for this point?
What is 1.
300
Which of the following is a good estimate for the correlation coefficient (0.3, 0.6, 0.8, 0.9)?
What is 0.8.
400
According to the table, what percent of females also prefer baseball?
What is 44%
400
Which graph shows the most accurate line of best fit?
What is A
400
The following residual plot indicates that a linear model would not be appropriate for a scatter plot.
What is false.
400
Which of the following is a good estimate for the correlation coefficient (0, -0.3, -0.5, -0.7)
What is -0.3.
500
According to the table, of the people who prefer basketball, what percent are male?
What is 48%
500
What is the slope for the line of best fit?
What is 3/4
500
A residual plot shows what about a linear model?
What is whether a linear model is appropriate and the accuracy of the actual value to the estimated value
500
What is important to remember about correlation and causation?
Correlation does not imply causation