MAD
What is MAD
Mean Absolute Deviation
What measure of central tendency is best to use
if there is an outlier?
Median
To have a good sample, it must be __________ of the population
representative
This is the sum the numbers in a set, divided by the number of items in the set
Mean/Average
The type of sample in which each member of the sample set or group has an equal chance of being chosen.
Random
Which is Not a step for MAD
Find the Range
The median of the bottom half of your data in a box and whisker plot?
Lower Quartile
Bias or not bias
Asking the 10 of 50 athletes if they think the school should increase funding for baseball.
Bias
The middle term in a set of data. If the data set has an even number of terms this is the average of the two middle terms.
Median
Find the range:
55,28,81,89,73,18,55
71
How many steps to find the MAD of a data set?
3
What are the measures of Central Tendency?
Mean, Median, Mode, Range
what percent of data is in the interquartile range
50%
A fancy name for Mean, Median, Mode, Range
Measures of Central Tendency
Find the Mode:
55,28,81,89,73,18,5
there is no mode
How do we know if the data is more predictable
What measure of central tendency is best to use
if I'm counting election results?
mode
What are the 5 magic numbers in a box and whisker plot?
Median
Lower Quartile
Upper Quartile
Maximum-Biggest #
Minimum-Smallest #
This is part of a population selected to predict information about the population as a whole.
Sample
Find the Median:
77,75,82,51,57,33,83
75
What is the M.A.D. of this data set? 3,6,6,7,8,11,15,16
3.75
What measure of central tendency is best to use
if the data are spread fairly evenly (no outlier)?
mean
Bias or not bias
The manager of a bookstore sends a survey to 150 customers who were randomly selected from their customer list.
not bias
This is a value which is much greater than, or much less than, the other values. It is important because it can affect your measures of central tendency greatly.
Outlier
What is the mean of this data set?
3, 6, 6, 7, 8, 11, 15, 16
9