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Arithmetic Mean from Frequency Table

Find the arit...

Question

Find the arithmetic mean of the following data:
2, 3, 4, 5, 6, 7, 8, 9

A

5.5

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B

4.5

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C

5

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D

6

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Solution

The correct option is A 5.5
The arithmetic mean = $\frac{S u m o f o b s e r v a t i o n s}{T o t a l n u m b e r o f o b s e r v a t i o n s}$ = $\frac{2 + 3 + 4 + 5 + 6 + 7 + 8 + 9}{8}$ = $\frac{44}{8}$ = 5.5.

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