soci 3307 texas state test 1

mean

interval/ratio

median

ordinal

mode

nominal

simple categories

nominal

categories and order

ordinal

categories, order, equal interval

interval/ratio

positive skew

tail points to right, higher numbers

negative skew

tail points to left, lower numbers

+/- 1 standard deviation

68%

+/- 2 standard deviation

95%

+/- 3 standard deviation

99%

the sum of deviations from the mean is always equal to _______

zero

n

sample size

N

population size

"x-bar"

sample average

"mu"

population average

z = 1.96

exactly 95%

z = 2.58

exactly 99%

THE normal distribution mean is equal to ____

zero

THE normal distribution standard deviation is equal to _____

1

THE normal distribution has a baseline made up of ____

z-scores

in a normal distribution, ______ measures of central tendency are equal

all (mean, median, and mode)

THE normal curve is based on ______ cases

infinite

standard deviation is the ______ of variance

square root

a table or listing that shows values and how many times each value occurs is a _______

frequency distribution

researchers generally want to be able to generalize their results to a ________ , but to do so, they typically carry out their research on the basis of a ________

population, sample

statistics that are used to summarize data are referred to as _______

descriptive statistics

descriptive statistics are used to ____________

summarize or describe data

the measure of central tendency that is sensitive to extreme scores is the ______

mean

the measure of dispersion that is based upon absolute values of deviations from the mean is the _____

average or mean deviation

ratio of the difference between a particular score and the mean of the distribution to the standard deviation of the distribution

z-score

a skewed distribution that has most of the cases on the right side of the curve and a few extreme scores on the left side of the curve would be a _____

skewed distribution with a negative skew

a skewed distribution that has most of the cases on the left side of the curve and a few extreme scores on the right side of the curve would be a _____

skewed distribution with a positive skew

the point at which a normal curve begins to change direction and the point located one standard deviation above and below the mean is referred to as the _______

point of inflection

how much area under the normal curve is found beyond the Z values of +/- 1.96?

5%

how much area under the normal curve is found beyond the Z values of +/- 2.58?

1%

the normal curve/distribution is a(n)

theoretical curve/distribution

the ratio of the difference between a score and the mean, divided by the standard deviation

z-score

1-2-3 rule

used to approximate area under curves when data are normally distributed and when there is a standard deviation

(n+1)/2

median position

measures of dispersion

range, variance, standard deviation

wide distributions, ______ degree of variability

high

narrow distributions, ______ degree of variability

low

in a positive skew, the mean is ______ than it should be

higher

in a negative skew, the mean is ______ than it should be

lower