Mr Hardknuckles’ Class

How tall are they ?

Mr Hardknuckles recorded the heights of students in his class. These are the results. (Heights are in

cm)

164, 171, 152, 165, 147, 153, 158, 161, 155, 168, 162, 173, 149, 167,166, 155, 163, 174, 148, 151, 142, 162, 181, 154, 139, 167, 143, 165, 153.

Draw a Frequency Table for this data.

Write these numbers into your book.

Frequency Table

Score Tally Frequency

164, 171, 152, 165, 147, 153, 158, 161, 155, 168, 162, 173, 149, 167,166, 155, 163, 174, 148, 151, 142, 162, 181, 154, 139, 167, 143, 165, 153.

130 -

140 -

150 -

160 -

170 -

180 -

1

5

9

11

2

1

Draw a Histogram

In a histogram the bars touch each other.

130 140 150 160 170 180

SCORE

10

8

6

4

2

0

12

FRE

QU

EN

CY

Max = _________

Min = ________

Range = ________

Modal class = ________

Median = ________

Mean = ________

181

139

42

160 - 169

161

4608 29 158.9

Middle when ranked

Biggest group

Highest score

Lowest score

Max - Min