Question: A researcher obtained a sample from a population and measured an interval-level variable on each case. Here are the values he obtained: 47, 53, 67,

A researcher obtained a sample from a population and measured an interval-level variable on each case. Here are the values he obtained:

47, 53, 67, 45, and 38. He found M = 50.00. Find the following: (a)

N,

(b) Σ(X – M),

(c) Σ(X – M)

2

.

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