Question

find the mean of the following distribution by step deviation method class interval 30 to 40 40 to 50 50 60 60 to 70 70 to 80 80 to 90 frequency 8 7 10 15 5 8

Answer 1

Answer:

$\frac{72}{12} \\ 6$

Step-by-step explanation:

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Answer 2

Answer:

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