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20. For variables measured at the nominal level, an appropriate measure of dispe

ID: 3128888 • Letter: 2

Question

20. For variables measured at the nominal level, an appropriate measure of dispersion is

A, the range.

the average deviation.

the index of qualitative variation.

the mode.

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21.

Which of the following quantities is required to compute the IQV?

The sum of the scores

The sum of the squared scores

The sum of the differentials

The sum of the squared frequencies

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22.

Measures of dispersion provide information about the

typical or most common score.

variety within the distribution of scores.

size of the sample.

adequacy of the selection criteria for the sample.

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23.

The index of qualitative variation (IQV) is the ratio of the actual variation in the scores to

one.

the maximum variation possible.

the minimum variation possible.

the number of scores.

A, the range.

B.

the average deviation.

C.

the index of qualitative variation.

D.

the mode.

Explanation / Answer

20. For variables measured at the nominal level, an appropriate measure of dispersion is

Option C is true.

21.

The sum of the squared frequencies

22.

Measures of dispersion provide information about the

variety within the distribution of scores.

23.

The index of qualitative variation (IQV) is the ratio of the actual variation in the scores to

the maximum variation possible.