9 terms

AP Stats Quiz 3

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Terms in this set (...)

If the distribution is slightly skewed and has outliers then use
Median and IQR to summarize the center and spread of distribution
If the distribution is symmetric with no outliers then use
mean and standard deviation
not resistant because one extreme value can change the whole answer
When describing a distribution, tell about:
shape, center, and spread
never used for categorical data
Shape
-humps (modes)
-uniform or not
-symmetric or skewed
-outliers or gaps
Center
-median
-mean
Spread
-range
-IQR
-standard deviation
-variance
Find upper fence by
Q3 +1.5(IQR)
Find lower fence by
Q1-1.5(IQR)
the distribution is skewed, because the mean and median
are not reasonably close together