(S 3.3) The number of adult attendees of a comedy show are listed by age group (age measured in years). Age Group Frequency f 6 Midpoint m 25-34 30 35-44 17 40 45-54 27 50 55-64 68 60 fam Find the grouped mean using the formula z = Number Now round your answer for to one decimal place. Find the grouped vanance and standard deviation using the formula 2m) (/m) 2-(Number W Number - Number Number Number Number Number lote use the equation editor or bypass it by typing an a our answer for a to one decima, place: ^2) of the form falb n-(n-1)