Unit 1
Variables measured with names or category labels are called...
nominal
What is it called when members of a population are given a chance to be represented in a survey?
Undercoverage
A measure of how spread out a set of value is...
What is variability?
What is the degrees of freedom equation used to find the significance of a correlation?
df = N−2
What effect does a low outlier have on the mean?
make the mean value lower
Participants give an incorrect response
Response error
If x decreases as y decreases, it is this type of correlation.
Positive correlation
Finish this sentence correlation does not imply...
What is Causation
What is Bivariate research?
The study of pairs (2) of variables
When asking two things in one question within a survey that allows only for one answer is called...
What is a Double Barrelled Question
When rejecting Ho, you are saying…
There is a relationship
If r= .2 what are the strength and direction of the correlation?
What is a weak positive
What is one of the ways colleges report biased SAT scores?
1. Report the higher average of mean and median
2.Publish scores of accepted instead of enrolled students
3.NIPS
Drawing new boundaries for electoral political districts for sinister or unlawful purposes
Gerrymandering
If there is no relationship, what is the decision regarding Ho?
Accept Ho
What are the possible explanations for a correlation?
1)X causes Y
2)Y causes X
3) A third variable cause X&Y
4)Coincidence
What is an incumbent?
Politician running for re-election
What are the 5 groups of races on the Census?
White, Black or African American, Asian, American Indian or Alaska Native, Native Hawaiian or Pacific Islander
What are the four significance tests?
Correlation
Chi square test
T-test
One-way Anova
Name all four of the steps to find the obtained r by hand.
a)SSx
b)SSy
c)SPxy
d) r = SPxy / ⎷SSx×SSy