Finding Mean for Grouped Data When Class Intervals Are Not Given
Find arithmet...
Question
Find arithmetic mean for the table given below
A
11.4
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B
12.5
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C
13.7
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D
15.6
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Solution
The correct option is A11.4 Arithmetic mean using direct method formula is ¯x=∑fixi∑fi First form a tabular column: Therefore, ¯x=∑fixi∑fi =11410 =11.4