Page 169 - Math Smart - 7

The ages of 40 people were recorded.

43 24 33 26 35 15 27 34 19 20
42 49 34 56 37 19 21 50 39 29
54 57 30 28 26 18 20 34 3 33
9 10 27 12 47 11 7 25 37 34

Organise the data in a frequency table.
Solution
This data should be organised into a grouped frequency table because there is a
wide range of data values. If the data was organised in an ungrouped frequency
table, you would need 31 rows.
Grouped frequency tables usually have about five to ten rows.

The class intervals must not
overlap.
Each data value can only be
in one class interval.

Age range Tally Frequency
0-9 III 3
In this example, there
II
10-19 m 7
are six class intervals.
1
20-29 mm 11
The size of each class
1
30-39 mm 11 interval is 10.
40-49 nil 4 All the class inten/als
are equal.
50-59 nil 4
Total 40

Check My

Und
m

Simone wants to find out which colour is the most popular colour for cars. She recorded the colours
of 40 cars in the parking area of a shopping centre.
red red blue green white red
blue red red blue white green
red white white blue red white
blue blue green black white blue
red silver silver blue red red
silver white white red blue green
red blue silver white

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