If the variance of the ages of the people who attended a rock concert is 22, what is the standard deviation of the ages? round your answer to two decimal places

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.