15. automobile fuel efficiency thirty automobiles were tested for fuel efficiency (in miles per gallon)…

15. automobile fuel efficiency thirty automobiles were tested for fuel efficiency (in miles per gallon). this frequency distribution was obtained. find the mean and modal class for the data. class boundaries frequency 7.5 - 12.5 3 12.5 - 17.5 5 17.5 - 22.5 15 22.5 - 27.5 5 27.5 - 32.5 2