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Question 5 (i)
A study was conducted to find out the concentration of sulphur dioxide in the air in parts per million (ppm) of a certain city. The data obtained for 30 days isas follows:
0.030.080.080.090.040.170.160.050.020.060.180.200.110.080.120.130.220.070.080.010.100.060.090.180.110.070.050.070.010.04
(i) Make a grouped frequency distribution table for this data with class intervals as 0.00 - 0.04, 0.04 - 0.08, and so on.


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Solution

Taking class intervals as 0.00−0.04, 0.04−0.08, and soon, a grouped frequency table can be constructed as follows.
Concentration of SO2(inppm)Number of days(frequency)0.000.0440.040.0890.080.1290.120.1620.160.2040.200.242Total30


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