61 A study was conducted to find out the
concentration of sulphur dioxide in the
aur in patts per million (ppm) in a city
the obtained data is of 30 days are
as follows
0.03 0.00 0.08 0.04 0.09 0.07 0.16
O. OS 0.02 0.06 0.18 0.20 0.11 0.08
0-12 0.13 0.22 0.07 0.08 0.01 0.10
006 0.09 0.18 0.11 0.07 0.01 0.04 0.05
0.07 make the grouped Prequency
distribution table for this data in
class interval as 0.00-0.04,0-04-0or
and so on.
Answer:
Answer
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Concentration of
sulphur dioxide (in ppm) Frequency
0.00 – 0.04 4
0.04 – 0.08 9
0.08 – 0.12 9
0.12 – 0.16 2
0.16 – 0.20 4
0.20 – 0.24 2
Total 30
(i) The figure above is the grouped frequency distribution.
(ii) The number of days for which concentration of SO
2
is more than 0.11→0.12−0.16,0.16−0.20,0.20−0.24
∴ Total number of days =2+4+2=8 days.