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For a frequency distribution of qualitative data, if the observations can be assigned to
only one class, the classes are __________________________.
The _____________ method is useful in smoothing out a time series.
An ANOVA comparing the waiting times for four different emergency rooms shows the
following comparison of the four mean waiting times.
Which two pairs of means are significantly different?
A ___________ is useful for displaying the relative frequency distribution for a
nominal variable.
_____ is the usual index number associated with the base period for the CPI.
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