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The income distribution of a sample of 50 MTN subscribers in the Lagos area is as follows:
Income Number of(N'000s) Subscribers
20 - 30 2031 - 41 1542 - 52 1053 - 63 5
(a) Compute the arithmetic mean of the subscribers' incomes.
(b) Compute the modal and median incomes.
Now compute the standard deviation for this distribution.
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