Question

To find out the concentration of so, in the air (in parts per million, i.e., ppm), the data
was collected for 30 localities in a certain city and is presented below:
Concentration of So, in ppm)
Frequency
0.00 -0.04
0.04 -0.08
0.08 - 0.12
0.12 - 0.16
2
0.16. - 0.20
0.20 -0.24
2
Find the mean concentration of So, in the air.​

Answer 1

Answer:

Find the class mark first

0.02, 0.06, 0.1, 0.14, 0.18, 0.22

since frequency is same for all of them, you add all of them

(0.02 + 0.06......+0.22) = 1.44

total frequency = 2×6 = 12

So mean = 1.44/12=0.12Ans

Answer 2

Step-by-step explanation:

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