heights of 50 girls of class x of a school are given below
height in cm | no.of girls
135-140 |. 5
140-145 |. 8
145-150 |. 9
150-155 |. 12
155-160 |. 14
160-165. |. 2
find the mean, median and mode
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Answer:
Height Cumulative frequency
more than 135 50
more than 140 45
more than 145 37
more than 150 28
more than 155 16
more than 160 2
Plot the points on the graph:
(135,50),(140,45),(145,37),(150,28),(155,16) and (160,2) to get the ' more than type' ogive as follows:
From frequency table, N=50⇒N/2=25
At y=25
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=151 units
Median height =151 cm
Step-by-step explanation:
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Step-by-step explanation:
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