Variability
Standard Deviation
Working with Measurements of Central Tendency and NOIR
Calculations!
Equations
100
Variability tells us what is ________ in a data set
What is typical
100
Smaller SD means the mean is _________ representative of the data set
What is highly
100
The scale of measurement used in an eye color survey
What is nominal
100
The range of 3, 7, 14, 37, 41, 53, 69, 71, 77, 81
What is 78
100
x̄
mean/average
200
How does the height of a drop affect the time of the drop
higher the drop - longer the drop
200
Normal curves have ______ standard deviation
What is low
200
The scale of measurement used in the results of a marathon
What is ordinal
200
The average of: 8, 13, 3, 9, 4, 10
What is 7.83
200
Σx/n
What is average/mean
300
Used to measure variability - other than average and standard deviation
What is range
300
Standard deviation is made ______ with gaps in the data
What is larger
300
The scale of measurement used to measure IQ
What is interval
300
The standard deviation of: 8, 4, 5, 6, 1, 2, 10
What is 3.18
300
√Σ(x-x̄)²/N-1
What is standard deviation
400
Skew in a data set is often caused by this
What is an outlier
400
The percentage of scores that are no more than 1 Standard Deviation away from the mean on normal curves
What is 68%
400
The scale of measurement used on a ruler
What is ratio
400
Average deviation of: 12, 8, 17, 18, 4, 6
What is 0
400
Xmax - Xmin
What is range
500
Variability ________ as standard deviation decreases.
decreases
500
The percentage of scores that are no more than 2 Standard Deviations away from the mean on normal curves
What is 95%
500
The best measure of central tendency to use when there are large outliers
What is median
500
Standard Deviation of: 34, 19, 81, 56, 69, 45, 55, 43, 47
What is 18.31
500
Σ(x-x̄)/N
What is average deviation
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