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Question
The marks in a subject for 12 students are as follows:
31, 37, 35, 38, 42, 23, 17, 18, 35, 25, 35, 29
For the given data, find the mean
Solution
Given data is 31, 37, 35, 38, 42, 23, 17, 18, 35, 25, 35, 29.
Rearranging the given data in ascending order,
17, 18, 23, 25, 29, 31, 35, 35, 35, 37, 38, 42
Mean = `"Sum of all observations"/"Total number of observations"`
= `(17 + 18 + 23 + 25 + 29 + 31 + 35 + 35 + 35 + 37 + 38 + 42)/12`
= `365/12`
= 30.41
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