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Solution - Mean of Grouped Data

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Question

The measurements (in mm) of the diameters of the head of the screws are given below:

Diameter (in mm)No. of Screws
33 — 3510
36 — 3819
39 — 4123
42 — 4421
45 — 4727

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

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Find the mean concentration of SO2 in the air.

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Solution for concept: Mean of Grouped Data. For the course 9th - 10th SSC (English Medium)
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