Find the mean of 8, 6, 10, 12, 1, 3, 4, 4.
Solution:
8, 6, 10, 12, 1, 3, 4, 4
Here, n = 8
∴ Mean (x̄) = Ʃ xi/n
= (8 + 6 + 10 + 12 + 1+ 3 + 4 + 4)/8
= 48/8 = 6
Hence, mean of the given data is 6.
5 people were asked about the time in a week they spend in doing social work in their community. They replied 10, 7, 13, 20 and 15 hours, respectively. Find the mean time in a week devoted by them for social work.
Solution:
10, 7, 13, 20, 15
Here, n = 5
∴ Mean (x̄) = Ʃ xi/n
= (10 + 7 + 13 + 20 + 15)/5
= 65/5 = 13
Hence, the mean time in a week devoted by them for social work is 13 hours.
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