Question

a group of 20 students recorded their heights ( in cm ).Data is received were as given below what is the range ? 150,120,112,160,155,151,158,142,148,149,161,165,140,157,156,146,148,153,138,135,

Answer 1

Step-by-step explanation:

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