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independentgroups t test
a parametric inferential test for comparing sample means of two independent groups of scores.

standard error of the difference between means
standard deviation of the sampling distribution of differences between the means of independent samples in a twosample experiment.

effect size
the proportion of variance in the dependent variable that is accounted for by the manipulation of the independent variable.

cohen's d
an inferential statistic for measuring effect size.

correlatedgroups t test
parametric infrential test used to compare the means of two related (within or matchedsubjects) samples.

difference scores
scores representing the difference between subjects' performance in one condition and their performance in a second condition.

standard error of the difference scores
the standard deviation of the sampling distributio of mean differences between dependent samples in a twogroup experiment.

wilcoxon ranksum test
a nonparametric inferential test for comparing sample medians of two independent groups of scores.

wilcoxon matchedpairs signedranks T test
a nonparametric inferentil test for comparing sample medians of two dependent or related groups of scores.

chisquare (x^{2}) test of independence
nonparametric inferential test used when frequency data have been collected to determine how wellan observed breakdown of people over various categories fits some expected breakdown.

phi coefficient
an inferential test used to determine effect size for a chisquare test.

a(n) ___ is a parametric inferential test for comparing sample means of two independent group of scores.
independentgroups t test

___ is an inferential statistic for measuring effect size with t tests.
cohen's d or r^{2}

a(n) ___ is a parametric inferential test used to compare the means of two related samples.
correlatedgroups t test

when using a correlatedgroups t test, we calculate __, scores representing the difference between subjects' performance in one condition and their performance in one condition and their performance in a second condition.
difference scores

the standard deviation of the sampling distribution of mean differences between dependent samples in a twogroup experiment is the ___.
standard error of the difference scores

___ and ___ frequencies are used in the calculation of the x^{2} statistic.
observed; expected

the nonparametric inferential statistic for comparing two groups of differentpeople when ordinal data are collected is the ____.
wilcoxon ranksum test

when frequency data are collected, we use the ___ to determine how well an observed frequency distribution of two nominal variables fits some expected breakdown.
x^{2} test of independence

effect size for a chisquare test is determined by using the ____.
phi coefficient

the wilcoxon ___ test is used with withinsubjects designs.
matchedpairs signedranks T

the wilcoxon ranksum test is used with ___ designs.
betweensubjects

chisquare tests use ___ data, whereas wilcoxon tests use ___ data.
nominal; ordinal

when comparing the sample means for two unrelated groups we use the:
indepnedentgroups t test

the value of the t test will ___ as sample variance decreases.
increase

which of the following t test results has the reatest chance of statistical significance?
t(28) = 3.12

if the null hypothesis is false, then the t test should be:
greater than 1

imagine that you conducted an independentgroups t test with 10 participants in each group. for a onetailed test, the t_{cv} at ∝=.05 would be:
±1.734

if a researcher reported for an independentgroups t test that t(26)= 2.90, p < .005, how many subjects were there in the study?
28

H_{a}: µ_{1}≠µ_{2} is the __ hypothesis for a __tailed test.
alternative; two

cohen's d is a measure of ___ for a ___.
effect size; t test

t_{cv }= 2.15 and t_{obt} = 2.20. Based on these results we:
reject H_{0}

If a correlatedgroups t test and an independentgroups t test both have df = 10, which experiment used fewer subjects?
the correlatedgroups t test

if researchers reported that, for a correlatedgroups design, t(15) = 2.57, p < .05, you can conclude that:
a total of 16 people participated in the study.

parametric is to nonparametric as ___ is to ___.
t test; x^{2} test

which of the following is an assumption of x^{2} tests?
the sample should be randomly selected

the calculation of the df for the ___ s (r1) (c1)
x^{2}test of independence

the __ is a measure of effect size for the ____.
phi coefficient; x^{2} test of independence

the wilcoxon ranksum test is used with __ data.
ordinal

wilcoxon ranksum test is to __ desighn as wilcoxon matchedpairs signedranks t test is to __ design.
betweensubjects; withinsubjects

