The following is the number of minutes to commute from home

The following is the number of minutes to commute from home to work for a group of executives. 28 25 48 37 41 19 32 26 16 23 23 29 36 31 26 21 32 25 31 43 35 42 38 33 28 A. How many classes would you recommend? B. What class interval would you suggest? C. What would you recommend as the lower limit of the first class?

Solution

A. How many classes would you recommend?

range = 43- 16 = 27

landha = 1 + 3.2221 * log (n)

landha = 1 + 3.2221* log (25)

landha = 5.50

between 5 and 6 lcasses

B. What class interval would you suggest?

width class = 25 / 6 = 4.16 = 4

C. What would you recommend as the lower limit of the first class?

the lower data that is 16