The time (in minutes) taken by 50 students to travel from home to school is recorded below. Note that the class widths are not uniform.
a. Class interval (minutes): 0–5 5–15 15–25 25–40 40–60
Frequency: 2 8 14 20 6
(a) Rewrite the distribution using continuous class boundaries.
b. (b) Identify the modal class.
c. (c) Determine the mode of the travel time, correct to two decimal places.