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.