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Measures of Dispersion MCQ

1. Appropriate measure of dispersion to use when variables are measured at the _____ level is known as Variation Ratio.

Nominal

Ordinal

Interval

Both a and b

Answer

Correct Answer: Both a and b

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2. Variance measures the ______ deviations from the mean for an interval/ratio variable.

Summed squared

Average squared

Average square root

None of these

Answer

Correct Answer: Average squared

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3. Square root of the squared deviations about the mean is known as _____

Variance

Standard Deviation

Standard Error

None of these

Answer

Correct Answer: Standard Deviation

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4. Range is a measure of dispersion appropriate for ______ level data.

Interval

Ratio

Both

None

Answer

Correct Answer: Both

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5. Q3 is the ______percentile in a distribution of scores.

100

Answer

Correct Answer: 75

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6. Q2 is the second quartile or the 50th percentile, also called the_____ , in a distribution of scores.

Mean

Median

Mode

Range

Answer

Correct Answer: Median

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7. Q1 is ______ percentile in a distribution of scores.

100

Answer

Correct Answer: 25

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8. ______ capture how different the values of a variable are.

Measure of Deviation

Measure of Dispersion

Measure of Variability

None of these

Answer

Correct Answer: Measure of Dispersion

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9. Mean Deviation Score is the distance between a score and the _____ of the group of scores.

Mean

Sum of mean

Square of mean

Sum of square of mean

Answer

Correct Answer: Mean

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10. IQR is a measure of dispersion appropriate for interval/ ratio-level data. It measures the range of scores in the middle 50% of a distribution of continuous scores and is calculated as the difference between the score at the third quartile (the 75th percentile) and the score at the _____ percentile.

100

Answer

Correct Answer: 25

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11. Graphical technique to display the distribution of a variable that is part of the exploratory data analysis (EDA) family is known as Boxplot.

True

False

Answer

Correct Answer: True

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