Psych Stat. Ch. 3-4 Central Tendency & Variability

Which measure of central tendency is most affected by extreme scores?

The mean is most affected.

Which measure of central tendency is generally most resistant to extreme scores?

The median is the most resistance.

Which measure of central tendency is especially useful when the variable consists of categories?

The mode is useful.

In a positively skewed distribution, which relationship is generally expected?

Mode < Median < Mean

In a negatively skewed distribution, which relationship is generally expected?

Mean < Median < Mode

A person's salary is $30,000, while another person's salary is $2,000,000. Which measure would likely be more representative of the typical salary?

The median is the most representative.

What does a small standard deviation mean?

The scores are clustered close towards the mean.

What does a large standard deviation mean?

The scores are more spread out.