Chapter 31
Summarizing data with descriptive statistics
Questions answered in this chapter:
What defines a typical value for a data set?
How can I measure how much a data set spreads from its typical value?
Together, what do the mean and standard deviation of a data set tell me about the data?
How can I use descriptive statistics to compare data sets?
For a given data point, can I easily find its percentile ranking within the data set? For example, how can I find the 90th percentile of a data set?
How can I easily find the second-largest or second-smallest number in a data set?
How can I rank numbers in a data set?
What is the trimmed mean of a data set?
I select a range of cells, is there an easy way to get a variety of statistics that describe ...
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