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Earn +20 ptsQ: Why are z-scores used to check for outliers?
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What are the limits on outliers?
there are no limits to outliers there are no limits to outliers
When is the mean used as a measure of central tendency?
When there aren't extreme values (outliers)
What is unaffected by outliers?
interquartile range
Does outliers affects data?
No. Outliers are part of the data and do not affect them. They will, however, affect statistics based on the data and inferences based on the data.
Is range is not considered to be an index of despersion?
The sample range could be used as an index of dispersion. However, there are objections. One is that this statistic is obviously sensitive to outliers. Another is that for many population distributions there are measures with much better characteristics, even ignoring the problem of outliers.
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