Ann is baking cookies. she bakes three dozen oatmeal raisin cookies, two dozen sugar cookies, and four dozen chocolate chip cookies. ann gives away two dozen oatmeal raisin cookies, 1.5 dozen sugar cookies, and 2.5 dozen chocolate chip cookies. how many total cookies does she keep

She keeps 60 cookies. First, add the total amount of cookies she baked. Since there are 12 to a dozen, you will find that she baked 108 cookies. Then, subtract 48, because she gave away a total of 4 dozen cookies (2.5dozen+1.5dozen=4 dozen). When 48 is subtracted from 108, you are left with a total of 60.

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.