True or false
1.T or F:A numerical variable is continuous if it’s possiblevalues correspond to isolated points
on the number line.
2.T or F:A control group provides a baseline for comparison witha treatment group.
3.T or F: A unimodal set of data is one that contains only onevariable.
T or F: When using histograms to compare groups of different sizes,one may use either
frequencies or relative frequencies for the vertical axis and stillbe effective.
4.T or F:One disadvantage of using the mean as a measure ofcenter for a data set is that its
value can be affected by the presence of even a single outlier inthe data set.
5.T or F:he interquartile range is a measure of spread in a setof data.
T or F: for any given data set, the median must be greater than orequal to the lower quartile,
and less than or equal to the upper quartile.
6.T or F: The standard deviation about the least squares line isroughly the typical amount by
which an observation deviates from the least squares line.
7.T or F :The interquartile range is resistant to the effect ofoutliers.
8.T or F:The correlation coefficient, r, does not depend on theunits of measurement of the two
variables.
