Ian is another of josie’s clients. he is 60 years old. what is the mhr for ian when he is training? formula - mhr = 217 (2/3 x age)

Do you mean mhr = 217 - (2/3 × age) ? ? then his mhr is 217-(2/3)(60) = 177

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.