Question

class Frequency

6
80-90 18
90-100 78
100-110 80
110-120 100
120-130 72
130-140 0
140-150 40
150-160 6
160 - 170



Find Mean​

Answer 1

Answer:

Answer:-

Class interval x

i

Frequency

(f

i

) f

i

x

i

50-70 60 18 1080

70-90 80 12 960

90-110 100 13 1300

110-130 120 27 3240

130-150 140 8 1120

150-170 160 22 3520

Σf

i

=100 Σf

i

x

i

=11220

mean=

Σf

i

Σf

i

x

i

=

100

11220

=112.20