2. The measurements (in mm) of the diameters of the head of the screws are given below:
Diameter (in mm) 33-35 36-38 39-41 42-44 45-47
Number of screws 10 19 23 21 27
Calculate the mean diameter of the head of the screw by assumed mean method.
Solution :
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10
Answer:
the mean diameter of the head of the screws is 40.54 mm
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39
Answer:
the correct answer of this question is 40.24 mm
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