B. The number of families who used the day care service was recorded during 22-days

period. The results are as follows: [06]

31 49 19 62 24 45 23 51 55 60 40

35 54 26 57 37 43 65 18 41 50 42

i. Construct a cumulative frequency distribution.

ii. How many days saw fewer than 20 families utilize the day care center?

iii. Based on cumulative relative frequencies, how busy were the highest 60% of the

days?