Question

What is the mean deviation from the mean of the following observation:

9,9,2,3,6,9,4

a.

2.50

b.

2.62

c.

2.40

d.

2.57

Answer: (d).2.57

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Q. What is the mean deviation from the mean of the following observation: 9,9,2,3,6,9,4

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