Variables
Outliers and Predictions
Correlations
Reading & Creating Scatterplots
Line of Best Fit
100
This variable goes on the x-axis.
What is the explanatory variable?
100
What is an outlier?
What is a point that does not follow the trend of the rest of the data?
100
What type of correlation does this graph show?
What is positive?
100
What are two points on the line of best fit?
What is (16,300) and (22,500)
100
How do you determine where to place the line of best fit?
There should be an equal number of points above and below the line.
200
This variable is often impacted by the other variable and is placed on the y-axis.
What is the response variable?
200
Which point is the influential point?
What is approximately (30, 6000)?
200
What type of correlation is shown in the scatter plot?
What is negative?
200
What is the association of this graph? Will the slope be positive or negative?
This graph shows a negative association and a negative slope.
200
Two points on the line of best fit are (4, 85) and (2, 70).
Find the slope for the line of best fit using these points.
15/2
300
If I am graphing the number of shots made and the hours of practice for a player, which would be the explanatory variable?
What is the number of hours of practice?
300
Based on the scatter plot, extrapolate how many CDs would be sold for 2 jars of jam?
What is about 15 CDs?
300
What type of correlation is shown?
What is no correlation?
300
How do you make predictions using a scatter plot?
1) Draw a line of best fit.
2) Determine the slope and y-intercept.
3) Write an equation and use it to make a prediction.
300
What are two points on the line of best fit?
Two points on the line of best fit are: (4, 1) and (3, 2)
400
On a graph showing the relationship between salary and years of experience, which variable would be the response variable?
What is salary?
400
If a person is 45 years old, based on the scatter plot, extrapolate what should they expect their income to be?
What is about 45,000.
400
Describe what a positive correlation means for data.
When one variable increases the other variable will also increase.
400
Describe the association of this data.
There is no linear association.
400
What is the Mean Absolute Deviation of this data:
2, 8, 4, 6, 7, 3
2
500
Write a sentence describing the relationship between the average daily temperature and the number of beach visitors.
The number of beach visitors increases as the average daily temperature increases.
500
It describes the average distance between each data value and the mean.
What is standard deviation?
500
Describe what a negative correlation means for data.
When one variable increases the other variable will decrease.
500
Describe the association of this data.
There is no linear association.
500
What is the Mean Absolute Deviation for the following numbers?
1, 1, 2, 2, 2, 2, 3, 3
0.5