Question

Height (in cm) of 30 students in a class is given below. Make a frequency table using tally marks.
147, 148, 148, 149, 150,149, 149, 147, 150, 148, 150, 151, 148, 149, 150, 149, 147, 151, 148, 150,
148, 147, 149, 150, 150, 151, 147, 151, 148, 150
(a) Which height has the highest frequency?
(b) Which height is minimum frequency?​

Answer 1

Answer:

Minimum height =131cm

Maximum height =156cm

Range =156−131=25

Number of classes =4

Class range =

4

25

=6.25 approx 6

class 1=131+6=137

class 2=137+6=143

class 3=143+6=149

class 4=149+6155

class 5=155+6=161

Class interval Frequency

131−137 9

137−143 3

143−149 2

149−155 4

155−161 2