QUIZ social stats

A measure of how scores scatter around the center of a distribution is

All of the above

The greater the variability around the mean of a distribution, the larger the

All of the above

Which of the following is not used to make comparisons between distributions when their total frequencies differ?

Class limits

A distribution of income is highly skewed. Which measure of central tedency are you likely to employ for the purpose of characterizing income?

Mean

Which measure of central tendency is considered the point of balance in a distribution?

Mean

You have a distribution of children's empathy scores that approximate a normal curve. Which measure of central tendacy are you likely to use for the purpose of characterizing empathy?

Mean

Which measure of central tendency cuts a distribution in half when the scores are arranged from high to low?

Median

A distribution of the strength of attitudes toward legalized abortion has two points of maximum frequency, indicating that many people strongly oppose it and many people strongly support it. Which measure of central tendency are you likely to employ for the purpose of characterizing the strength of attitudes toward legalized abortion?

Mode

Which measure of central tendency represents the point of maximum frequency in a distribution?

Mode

Which of the following is employed when comparing a score on a final examination against the entire distribution of grades in a class?

Percentile rank

Which of the following statesments is most true about the relative size of measures of variability?

The variance is usually larger than the standard deviation.

Frequency distributions can be used to

all the above

Deviation indicates the_______of any raw score from the mean.

direction

The measure in this chapter are known as measure of central tendency because they tend to

fall toward the center of a distribution, where most of the scores are located.

A frequency distribution of the number of defendents sentenced to death in each of the 50 states during the year 2001 would be depicted best in the form of a

frequency polygon.

To show changes in birth rate from 1980 to the present, by year, a researcher would probaly use a

line chart.

A cross-tabulation of serious illnesses is a table in which the distribution of illness is

presented seperately for the categories of a second variable, such as gender, age, or race.

By definition, class intervals contains more than one

score value.

The direction of skewness is determined by the relative position of the

tail of the distribution.

A cross-tabulation would be useful for comparing

the amount of attention-a little, a moderate amount, or a great deal-a particular teacher gives to 30 black and 30 white students.