Chapter Statistics, Exemplar Class IX Ex 14.3 NCERT Exemplar ...

Chapter Statistics, Exemplar Class IX Ex 14.3 NCERT Exemplar Solutions by Dev Anoop (Bathinda) 4.

Class Size = 15 – 5 = 10 10 2 =5–5 =0 First Upper Limit = Lower Limit + class Size = 0 + 10 = 10

First Lower limit = 5 −

Mid Value 5 15 25 35 45 Total 5.

Class Interval 0 - 10 10 - 20 20 - 30 30 - 40 40 – 50

Frequency 4 8 13 12 6 43

154 – 153 =1 1 2 = 0.5 Each Lower Limit – 0.5, Each Upper Limit + 0.5 153.5 is included in the second interval and 157.5 is included in the third interval.

Class Interval 150 - 153 154 - 157 158 - 161 162 - 165 166 - 169 170 - 173 Total

2

Continuous CI 149.5 – 153.5 153.5 – 157.5 157.5 – 161.5 161.5 – 165.5 165.5 – 169.5 169.5 – 173.5

Frequency 7 7 15 10 5 6 50

NCERT Exemplar Solutions by Dev Anoop (Bathinda)