quiz 5 psych stats
in a one-way anova, a participant's score is +4 units from the value of GM, additionally, her score is -1 units away from her groups mean (M). how far from the GM is the M?
+5 units
a consumer psychologist is interested in the effects of annual income and motivations to shop on shopping patterns of consumers. if annual income (broken into two levels: high and moderate) and motivation to shop (with three levels: escape, necessity, socializing) and considered in one study, how many cells will there be?
6
in an one-way anova. E(x-m)^2 + E(m-gm)^2=
E(x-gm)^2
in a factorial design a "cell" is
a particular combination of levels of the variables that divide the groups
the scheffe test is
a post-hoc comparison procedure
the test performed mean after the omnibus test in a one-way anova with 3 levels of the independent variable to determine precisely where the difference occurred is called
a post-hoc test
in a factorial analysis of variance, DFwithin can be calculated by
both a and c
as compared to a t test for independent means an anaylsis of variance
can be used in any situation in which a t test for independent means would be used, but a t test for independent means cannot be used in all situations in which an analysis of variance would be used
beta is the probability that
if the research hypothesis is true, the experiment would still fail to support it
a two way factorial design
is "two way" because there are two variables that divide the groups whose influence is being studied
in day to day life, people informally form and test hypothesis. for example, one might wonder if attending every class causes students to get good grades, or if it's that the variation between students (ie. individual differences) is more important. regardless of whether they attend class or not? in this example, the variation between individuals
is analogous to within-group variance
one characteristic of an F ratio is
it is never less than 0
in a 2X2 factorial anova, you are figuring
one interaction and two main effects
if your research hypothesis states that there is a difference between the means of 3 samples, you carry out a(n)____ to test the null hypothesis that 3 populations have equal means
one-way anova
analyzing the data for studying requires that you complete a one-way anova, which you do in SPSS. the output gives you an observed significance value of .032. seeing this, you
reject the null hypothesis
the median is greater than the mean in a distribution that is:
skewed to the left
for a one-way anova, sstotal=_____+ssbetween
sswithin
suppose that you are interested in the relation between number of years working for a particular company of loneliness at work. you survey 40 workers at this company and figure a connection been these two variables of -.90. this is considered a
strong negative linear correlation
when conducting an analysis of variance, when the null hypothesis is true, then all of the following are true EXCEPT
the F ratio will generally be much larger than 1
in a 2X2 analysis of variance, the degrees of freedom for each main effect are:
the number of levels of the variable minus one
the sum of the squared deviations of each score from the mean of its group plus the sum of the squared deviations of each score's group mean from the grand mean equals
the sum of squared deviations of each score from the mean
when the cell means of a factorial design study are graphed, if the patterns on one section of the graph are different from the pattern on the other section
there is an interaction effect
the core idea of one-way anova is
to think of each score in terms of its deviation from the overall mean being divided into two parts
a 2X2 factorial design has
two variables that divides the groups
setting the significance level cut off at .10 instead of the more usual .05 increases the liklihood of
type 1 error
failing to reject the null hypothesis when the research hypothesis is true is referred to as
type 2 error
in an F ratio, the denominator is always the ___ group estimate of the population variance
within
