M.A.D
True or False:
The absolute value can be either negative or positive
False, absolute values can only be positive.
Daily Double!
CALC INACTIVE
The mean of this data set
5, 4, 9, 6, 3, 3
30/6 =
5
2,3,3,3,4,4,6,7,12,18,19
IQR = 9
Describe and DRAW how to find the MEAN on the BOARD!
Show me how to find the sum and divide your total by the number of values in your data set!
A measure of center is a way of __________ the data by providing a central point of data.
SUMMARIZING
If the M.A.D is 0.1 this conclusion can be drawn
The data points are close to the mean!
Daily Double!
CALC INACTIVE
Find the mean: 30,3,22,5,1,6,1,3,1
Mean=9
Find IQR:
37, 42, 48, 51, 52, 53, 54, 54, 55
IQR: 9
Daily Double!
Describe and DRAW and example on the Board of finding the RANGE!
I am looking for a student to take the largest value and subtract the smallest value from their data set!
A sample is a ________ of an entire group.
Data collected from a sample is called a ______________________
SUBSET
SAMPLE STATISTIC
Find the mean of absolute deviation for these numbers:
48,52,54,55,58,59,60,62
48 + 52+ 54 + 55 + 58 + 59 + 60 + 62 = 448
448/8=56 (Mean)
Absolute Deviations: 8, 4, 2, 1, 2, 3, 4, 6
Sum= 30
MAD= 30/8 = 3.75
CALC INACTIVE
Find the Mean: 2.5, 2.6, 2.7, 2.8, 2.9
Mean = 13.5/5 = 2.7
Find the IQR:
62, 64, 69,70, 70, 71, 72, 73, 74, 75, 77
IQR = 5
Daily Double!
Describe and DRAW TWO EXAMPLES of the MEDIAN on the BOARD!
Hint: sometimes there is ONE middle and sometimes there are TWO!
You should demonstrate what to do when there is ONE middle and TWO middles!
Daily Double!
Everyone is the population must have an ___________ of being selected in order for the sample to be __________.
EQUAL CHANCE
RANDOM
Daily Double!
Find the mean of absolute deviation for these numbers:
3, 15, 6, 54, 7, 38, 10
3+ 15 + 6 + 54 + 7 + 38 + 10= 133
133/7=19 (MEAN)
Absolute Deviations: 16,4, 13, 35, 12, 19, 9
Sum: 108
MAD: 108/7= 15.4
CALC ACTIVE:
Find the Mean:
46.4, 29.3, 48.2, 35.1, 46.4, 39.5, 41.3, 25.2
Round answer to NEAREST TENTH
Mean = 38.925 = 38.9
Daily Double!
Find the IQR:
6.5, 7, 7.5, 8, 8, 8, 9, 10, 10.5
IQR= 2.25
Describe and DRAW and the 3 examples and possibilities when trying to find the MODE!
I am looking to see:
No Mode, One Mode, MORE than one mode!
Daily Double!
Once a sample has been collected from a population, an _______________ about the entire population can be made by setting up a ________. These inferences can also be used to compare different populations and make _____________.
INFERENCE
PROPORTION
PREDICTIONS
CALCULATOR INACTIVE
FIND the M.A.D:
2,3,4,5,3,2,1,2
2,3,4,5,3,2,1,2
Sum = 22/8 = 2.75
.75, .25, 1.25, 2.25, .25, .75, 1.75, .75
Sum = 8/8 = 1
M.A.D = 1
CALC ACTIVE
Find the Mean:
5.8,6.1, 1.9, 1.4, 2.6, 2.8, 1.3, 4.4, 4.4, 1.7
ROUND TO THE NEAREST TENTH
32.4/ 10 = 3.24
Rounded to nearest tenth = 3.2
5 number summary:
2, 5, 8, 3, 9, 6, 1, 4, 7
Minimum, Maximum, Median, Q1, and Q3
AND IQR
Min: 1, Max: 9, Median: 5
Q1: 2.5
Q3: 7.5
IQR: 5
AND WHYYYY?
the MEDIAN & listening for a good explanation!
A measure of Variability is a way of describing how _________ the data is. It can also be described as how much the data ________ from the center.
*YES, you can use your notes*
SPREAD OUT
DEVIATES