Exam 4

Question 1

In an ANCOVA, the covariate is a ____ variable

Answer 1

continuous

Question 2

Which test is the least powerful

Answer 2

Mann-Whitney

Question 3

To determine the effect of two independent variables on a dependent variable, what is the advantage of doing a single two way ANOVA as opposed to two separate one-way ANOVA’s

Answer 3

a two-way ANOVA asses possible interaction between the independent variables

Question 4

In an ANOVA, this is the normal variation expected in individuals that is not a result of being part of a “group” It results from such things as individual genetic makeup and environmental history

Answer 4

error variance

Question 5

The goal of this test is to detect differences between >2 independent means. Data are not normally distributed nor are the variances among groups equal.

Answer 5

KW

Question 6

Calculate ratio of between-groups variance/within-groups variance. Test statistic

Answer 6

F-ratio

Question 7

analysis of variance, a statistical method in which the variation in a set of observations is divided into distinct components.

Answer 7

ANOVA

Question 8

Determine probability; compare F-ratio with ______ (shape determined by 2 separate dfs)

Answer 8

F-distribution

Question 9

variation due to being part of a certain group (treatment)

Answer 9

between-group variance

Question 10

all variation not due to being in that group

Answer 10

error variance, within-group variance

Question 11

counteract the problem of maintaining an alpha level of 0.05 for multiple comparisons; many different post hoc tests

Answer 11

Post hoc pairwise tests

Question 12

factorial design; 2 independent variables (=factors)

Answer 12

two-way ANOVA

Question 13

Test whether sample means are from the same population

2. Powerful and robust

Answer 13

One-way ANOVA

Question 14

the interaction or cooperation of two or more organizations, substances, or other agents to produce a combined effect greater than the sum of their separate effects

Answer 14

synergism

Question 15

inhibition of or interference with the action of one substance or organism by another.

Answer 15

antagonism

Question 16

Test whether three or more sample

means are from the same population

Answer 16

Kruskal_Wallis Test

Question 17

Detect differences among means of two or more groups when the dependent variable is
affected by a third (continuous) variable

Answer 17

ANCOVA

Question 18

– techniques for data measured on an angular scale.
Angular scales are circular in nature, have no designated zero, and the designation of high
and low values is arbitrary. For example, 0 and 360 point to the same direction.

Answer 18

Circular statistics (Raleigh Test)

Question 19

variable reduction technique that describe variability
among multiple observed variables in terms of a lower number of non-measured derived
variables

Answer 19

Principal component analysis

Question 20

– a generalized form of ANOVA in which
there are two or more independent and/or two or more dependent variables. MANOVA
assesses main effects and possible interactions among the dependent variables and among the
independent variables

Answer 20

MANOVA

Question 21

each

individual is measured ≥ two

Answer 21

repeated measures of ANOVA

Question 22

regression
with a binary dependent variable (e.g.,
presence/absence)

Answer 22

Logistic regression

Question 23

regression with

>1 independent variable (Fig. 2)

Answer 23

Multiple regression