Question

a) The water-tax bills (in Rs.) of 30 houses in a locality are given below:- 161, 157, 155, 147, 152, 160, 156, 152, 156, 153, 157, 154, 151, 157, 153, 153, 159, 153, 150, 158, 154, 158, 160, 160, 148, 149, 162, 163, 159, 148 Prepare a frequency table as well as a cumulative frequency table with 160-165 (165 not included) as one of the class intervals.​

Answer 1

Height (in cm) Frequency

150−155 12

155−160 9

160−165 14

165−170 10

170−175 5

Total 50

(i) The above table is the grouped frequency distribution.

(ii) Students with 160−165cm heights are maximum i.e. 14 students.

Answer 2

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Height (in cm) Frequency

150−155 12

155−160 9

160−165 14

165−170 10

170−175 5

$\:\;\;:\implies$ Total 50

Note :

(i) The above table is the grouped frequency distribution.

(ii) Students with 160−165cm heights are maximum i.e. 14 students.