Variables
Outliers and Predictions
Correlations
Reading & Creating Scatterplots
Line of Best Fit and First Differences
100
This variable goes on the x-axis.
What is the independent variable?
100
What is an outlier?
What is a point that is distant (skewed) from the rest of the data?
100
What type of correlation (positive/negative, strong/weak) does this graph show?
What is strong, 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 depends on the other variable and is placed on the y-axis.
What is the dependent variable?
200
Which point is the outlier?
What is approximately (30, 6000)?
200
What type of correlation (positive/negative, strong/weak) is shown in the scatter plot?
What is strong, negative?
200
What is the relationship of this graph? Will the trend be upward or downward to the RIGHT?
As ____ increases, ____ decreases. Downward to the right.
200
What is it called if there is a pattern, but it is not a straight line?
non-linear
300
If I am graphing the number of shots made and the hours of practice for a player, which would be the independent variable?
What is the number of hours of practice?
300
Based on the scatter plot how many CDs would be sold for 2 jars of jam?
What is about 15 CDs?
300
What type of correlation (strong/weak/none, positive/negative/none) is shown? Write a sentence describing the relationship that impulsiveness has on empathy.
What is no correlation? Impulsiveness has no relationship with empathy.
300
How do you make predictions using a scatter plot?
Draw a line or curve of best fit.
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 dependent variable?
What is salary?
400
If a person is 45 years old, based on the scatter plot, what should they expect their income to be?
What is about 45,000.
400
Describe what a strong, positive correlation means for data.
When one variable increases the other variable will also increase, and the points fall close together.
400
Describe the relationship of this data.
There is no relationship.
400
What are the first differences used for?
To determine if the data is linear/non-linear, and increasing/decreasing.
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
What are scatter plots used for?
To make predictions about the data.
500
What are the four things you need to talk about when describing the relationship of data?
linear/non-linear, strong/weak, upward/downward to the right, and As the _____increases, ______increases/decreases.
500
Describe the association of this data.
Linear.
500
If the first differences are the same but all negative, what does this tell us?
That the data is linear, but going downward to the right.