QUESTION 1

What is the purpose of standard scores?

To compare different scores of one distribution.

To compare scores from different distributions.

To compare distributions with different means.

QUESTION 2

Which distribution has the smaller standard deviation?

The blue one.

The red one.

0.5 points

QUESTION 3

The table below shows the mean income, standard deviation, individual income, and z scores of two individual earners, Laura and Peter. Laura lives in the US, where the national mean income is $50,000 with a standard deviation of $35,000. Peter lives in Austria with a national mean income of $35,000 and a standard deviation of $20,000.

National Mean

Standard Deviation

Individual Income

Z Score

Income Laura

$50,000

$35,000

$60,000

0.28

Income Peter

$35,000

$20,000

$45,000

0.5

Comparing both distributions, who scores higher relative to the other income earners in their respective countries?

Laura

Peter

0.5 points

QUESTION 4

Which is NOT a characteristic of the normal curve?

Mean, median, and mode are the same values.

Is symmetrical

Is skewed

Is asymptotic

0.5 points

QUESTION 5

The table below shows the mean income, and standard deviation of the US and Austria.

National Mean

Standard Deviation

United States

$50,000

$35,000

Austria

$35,000

$20,000

Based on these statistics, which country has larger income variability?

United States

Austria

0.5 points