Variability quiz

A sample consists of n = 16 scores. How many of the scores are used to calculate the range?

2

A sample consists of n = 16 scores. How many of the scores are used to calculate the sample variance?

All 16

A large standard deviation means the scores _____ from the mean than with a small standard deviation.

Are more spread out

A measure of variability usually accompanies a measure of _________.

Central Tendency

A large spread (i.e., high variability) indicates that the individual scores are close to one another.

False

The variance is in the same units as the scores in the dataset.

False

Measures of variability can also be referred to as measures of dispersion.

True

Measures of variability can also be referred to as measures of spread.

True

The standard deviation is a computation of how ________ .

far on average each score is away from the mean

The denominator for the sample standard deviation formula is

n - 1

The formula for the standard deviation is to ________.

take the square root of the variance

A mean represents a data set with a large spread in scores ________ than a data set with a small spread in scores.

worse

When a researcher computes the deviation for each score in a distribution and then sums those deviations, the sum will always equal ______.

0

A measure of variability is usually presented on its own, not in connection with another statistic.

False

The smaller the variance, the more spread out the numbers in the distribution are.

False

The simplest measure of variability is the ________.

Range

The deviation of a score is equal to the __________.

Score minus the mean