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Solution - Mean of Grouped Data

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Question

To find out the concentration of SO2 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 SO2 (in ppm)Frequency
0.00 − 0.044
0.04 − 0.089
0.08 − 0.129
0.12 − 0.162
0.16 − 0.204
0.20 − 0.242

Find the mean concentration of SO2 in the air.

Solution

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No. of TreesNo. of Housing Societies
10-152
15-207
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Find the mean number of trees planted by Housing Societies by using ‘Assumed Means Method’

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Find the mean number of mangoes kept in a packing box. Which method of finding the mean did you choose?

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Find the mean daily wages of the workers of the factory by using an appropriate method.

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Calculate mean diameter of head of a screw by ‘Assumed Mean Method’.

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Reference Material

Solution for concept: Mean of Grouped Data. For the course 8th-10th CBSE
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