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1.
How do you calculate and interpret range, mean, and standard deviation?
Week 1
Calculate using mega stat.
Choose descriptive statistics.
Choose the range from your
data set and be sure to check all the boxes for the information you would like your output
to calculate.
The output will literally give you a listing of what you selected (such as the
mean, range, and standard deviation).
Mean – the average expected value
Range Largest minus the smallest measurement
Standard deviation –the square root of the variance
2.
What does knowing a measure of variation (range or standard deviation) tell you about
the data?
Week 1
a.
The range measures the interval spanned by the data.
b.
The standard deviation is the average deviations from mean.
3.
What do the Empirical Rule and/ or Chebychev’s Rule tell us?
Week 1
a.
If the population mean and standard deviation is described by a normal curve,
then:
a.i.
68.26%
of the population measurements lie within one standard deviation
of the mean
a.ii.
95.44% of the population measurements lie within two standard deviations
of the mean
a.iii.
99.73% of the population measurements lie within three standard
deviations of the mean
4.
What percent of the data fall between each quartile?
Week 1
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 Fall '10
 henry

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