Question

Example 17:
Monthly consumption of electricity in units of a certain family in ten months is given below.
210, 207, 315, 320, 250, 240, 232, 208, 315, 300
Compute mean.
Idol​

Answer 1

Answer:

Monthly Consumption

( in units) Cumulative frequency

more than 140 156

more than 160 153

more than 180 145

more than 200 130

more than 220 90

more than 240 40

more than 260 10

Plot the points on the graph:

(140,156),(160,153),(180,145),(200,130),(220,90),(240,40) and (260,10) to get the 'more than type' ogive as follows:

from frequency table, N=156⇒N/2=78

At y=78

Draw a horizontal line meeting the curve at P,AP

Draw a vertical line from point P which is parallel to y− axis and meets OX at M.

OM=226 units

Median consumption of electricity =226 units

Answer 2

the above answer is correct

HARE KRISHNA

CHANT

HARE KRISHNA MAHAMANTRA HARE KRISHNA HARE KRISHNA

KRISHNA KRISHN 16 ROUNDS DAILY