A light year is defined as the distance light travels in one year. One light year is 9.46 x 1012 kilometers. A galaxy is about 150,000 light years wide. About how
many kilometers wide is the galaxy?

The major difference is that a histogram is only used to plot the frequency of score occurrences in a continuous data set that has been divided into classes, called bins.  bar charts, on the other hand, can be used for a great deal of other types ofvariables  including  ordinal  andnominal  data sets.

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