Page 166 - Math Smart - 7

Design data collection sheets that can be used to find out the following.

a) Which make of cellphone is the most popular in a class in a school?
b) How many red, blue, white and silver cars pass an intersection in one hour?
c) What is the least popular mode of transport to school?
d) How many learners in a class enjoy reading more than watching television?
e) How many learners come from homes that separate glass, plastic, paper and metal for recycling?

Priya wanted to know which method of communication she used most. She designed a data collection
sheet and used it to record all communications over five days.

nn
g#- - Monday Tuesday Wednesday Thursday Friday Total

Text message -Hfl- II 1 m -m II 20
Voice call II II II II II 10

Video call 1 1
Email II -Htf 1 nil 12
Total 7 5 8 9 13 43

a) Priya made a mistake when she added up the tallies. Find and correct the mistake.
b) How many different methods of communication did Priya use?
c) How many voice calls did she make over the five days?
d) Which method of communication did she use most over the five days?

e) Which method of communication did she use least over the five days?
f) How many more voice calls than video calls did she make over the five days?
g) On which day did she use all methods of communication?
h) On which day did she text the most?

162 UNIT 7 Data handling