Chapter 4

Pataasin ang iyong marka sa homework at exams ngayon gamit ang Quizwiz!

The difference between the highest and lowest values in a distribution of scores is known as the

range

Scores that have a small standard deviation are relatively inconsistent.

False

For a somewhat normal distribution, the range is approximately equal to how many times the standard deviation:

6

Standard deviation can only be used for variables measured at which level?

The interval level

Which of the following is the least accurate measure of variability?

The range

Dispersion is synonymous with variation

True

The higher the standard deviation the greater the variation.

True

The standard deviation is a more effective measure of variation than the range.

True

The standard deviation measures dispersion.

True

Variability refers to

the spread of the sample scores.

Which of the following is a measure of variability?

the standard deviation

The average of the squared deviations is better known as

the variance

The standard deviation is a measure of

variability and dispersion

A synonym for variability is

width

A symmetrical distribution has no variation.

False

The standard deviation and IQR measure dispersion in the same way

False

The range is useful for

estimating the standard deviation

The IQR is defined as

Q3-Q1

When comparing between the variability of two characteristics that are measured in different units, social researchers should use the coefficient of variation.

True


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