Variables
Outliers and Predictions
Correlations
Things Other than Scatter Plots
Line of Best Fit
100
This variable goes on the x-axis.
What is the explanatory variable?
100
This is a point that does not follow the trend of the rest of the data?
What is an outlier?
100
This type of correlation is shown here.
What is positive?
100
This measure of center is the average of the data.
What is the mean?
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
The ordered pair at approximately (30, 6000) could be this type of point.
What is an influential point?
200
This type of correlation is shown in the scatter plot.
What is negative?
200
These are two measures of spread of data.
What are range and standard deviation?
200
Two points on the line of best fit are (4, 79) and (2, 70).
Find the slope for the line of best fit using these points.
What is 9/2?
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
This type of correlation is shown in the scatter plot.
What is no correlation?
300
This type of distribution is both symmetric and unimodal.
What is a normal distribution?
300
This is the form of a predictor line equation.
What is y = ax + b where a is slope and b is the y-intercept.
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 and the line of best fit, what should they expect their income to be?
What is about $45,000 - $50,000.
400
This type of association is shown as one variable increases, the other variable increases.
What is a positive association?
400
This percentage rule can be used in a normal distribution to determine how much data falls within one, two, and three standard deviations.
What is the 68-95-99.7% rule?
400
A set of data yields the following predictor line equation:
y= -0.34x + 18.58
Predict the value of y if x equals 38
What is y = 5.66?
500
Describe 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. (Positive association)
500
It is defined as making a prediction outside the data range.
What is extrapolation?
500
This is a numerical value that describes the strength and direction of a correlation.
What is a correlation coefficient (r-value)?
500
This graph displays numerical or quantitative data in which the values are divided into intervals and uses bars to display the frequency that each interval occured.
What is a histogram?
500
A set of data yields the following predictor line equation:
y = 0.07x + 7.16
Predict the value of x when y equals 11.
What is x = 54.86?