Associations
Trend Lines and Predictions
MAD
MAD 2
Trend Lines and Predictions 2
100
What type of correlation does this scatter plot have?
Positive Correlation
100
What do the m and b stand for in the slope-intercept for equation y = mx + b?
m represents the slope
b represents the y-intercept
100
Find the mean of these values:
12
100
Find the MAD:
0, 2, 4, 6, 8, 10
MAD: 3
100
What do we use to make predictions about a scatter plot?
A trend line.
200
What type of correlation does this scatter plot have?
No correlation
200
The y-value when x = 10
y = 90
200
What is the mean absolute deviation of these values: (round to the nearest tenth)
5.6
200
Find the MAD:
10, 20, 40, 50
MAD: 15
200
Predict the sales if the temperature is 30 degrees.
A. 800 B. 650
C. 1000 D. 700
A. 800
300
What type of association does this scatter plot have?
Nonlinear Association
300
This scatter plot shows the number of drinks in a vending machine and the number of days since the vending machine was last stocked. Using the trend line to predict the stock when there has been 8 days since it was last stocked?
200 drinks
300
Find the absolute mean variation of the set of values. Round to the nearest tenth.
2.6
300
Find the MAD (round to nearest hundredth):
9, 4, 12, 18
MAD: 4.25
300
Use the trend line to predict the time to run .5 miles.
5 minutes
400
What are the coordinates of the outlier on this graph?
(20, 18)
400
Use the equation y = -12.5x + 300 to predict the number of drinks in a vending machine that was last stocked 12 days ago.
150 drinks
400
B. Ratings with a high mean and low mean absolute deviation
400
Find the MAD (round to nearest tenth):
8.5, 10, 22.5, 36, 42.5
MAD: 12.8
400
Predict the score for 6 absences.
A. 74 B. 68
C. 82 D. 91
B. 74
500
Describe the type of association you expect to see between the number of hours a musician spends practicing and the number of mistakes the musician makes in a performance.
Negative
500
Use the equation y = -12.5x + 300 to predict the number of days since a vending machine was stocked if it currently contains 50 drinks.
20 days
500
Find the Mean and MAD of this data set, rounded to the nearest tenth:
8, 20, 36, 42, 60
Mean: 33.2
MAD: 15.4
500
Find the Mean and the MAD (round to nearest tenth):
80, 156, 37, 99, 102
Mean: 94.8
MAD: 20
500
Predict the score for 40 minutes played.
28 points