Mean Absolute Deviation (M.A.D.) of Data Sets

Multiple Choice

BELL-RINGER QUESTION #1

Determine the slope of the given graph.

HINT: Use two points to determine the rate of change (rise/run).

• m= 8/3

• m= 4

• m= 3/8

• m= 5/2

Graphing

BELL-RINGER QUESTION #2

Draw a line from the linear equation

y= -2/5x + 8

REMEMBER: slope-intercept form y=mx+b where variable-m is the slope (rate of change) and variable-b is the y-intercept (starting point on the y-axis).

Multiple Choice

PARTNER PRACTICE - CHECK FOR UNDERSTANDING

Based on the scatterplot, what is the best prediction of the number of hours a person spends at work if that person spends 5 hours on recreational activities?

NOTE: Check the labelings (x-axis and y-axis) of the graph.

• between 20 to 30 hours

• between 90 to 100 hours

• between 40 to 50 hours

• between 60 to 70 hours

Multiple Choice

PARTNER PRACTICE

1. The chart shows 8 cell-phones and the total number of contacts stored in each. Use the chart to find the mean absolute deviation of the data set.

• M.A.D. = 3.75

• M.A.D. = 4

• M.A.D. = 3.25

• M.A.D. = 56

Multiple Choice

PARTNER PRACTICE

2. The table to the shows the maximum speeds of eight roller coasters at an amusement park. Find the mean absolute deviation of the set of data.

• M.A.D. = 64

• M.A.D. = 6

• M.A.D. = 10.75

• M.A.D. = 12.5

Multiple Choice

EXIT TICKET 12/04 - TEK 8.11B

The list shows the number of songs that five students each listened to last week.  What is the mean absolute deviation of the numbers in the list?

32, 43, 38, 28, 51

• M.A.D. = 34.4

• M.A.D. = 6.88

• M.A.D. = 38.4

• M.A.D. = 7.68