The Advantage of Squaring the Deviation of Each Score from the Mean

question 52

Multiple Choice

The advantage of squaring the deviation of each score from the mean and then summing is that

• A) it makes the sample variance an unbiased estimator of the population variance.
• B) it makes the degrees of freedom for sample variance equal to n - 1.
• C) it produces a minimal positive solution that is not zero, as long as all scores are not exactly the same value.
• D) it makes the sample variance an unbiased estimator of the population variance and it produces a minimal positive solution that is not zero, so long as all scores are not exactly the same value.

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Definitions:

Bases

Substances that accept protons according to the Brønsted-Lowry definition or donate electrons in the Lewis definition, commonly displaying a pH greater than 7.

Buffers

Substances that minimize changes in the pH of a solution when an acid or base is added to it, helping to maintain stability in biological systems.

α-Helix

A common motif in the secondary structure of proteins, characterized by a right-handed coiled or spiral shape, where the amino acid residues are arranged in a helical structure.

Secondary

Pertaining to a secondary stage or level, implying it follows a primary stage and usually is dependent on or results from it.