math test prep Flashcards
influences the response somehow
leading question
assumes something about the respondent
loaded question
questions ask more than one issue but only want singular response
double-barried
morally correct
ethics
three types of random sampling techniques
random, random groups, non random
percentages of population randomly chosen
simple random sample
chose individuals at regular intervals
systematic random sample
population split into demographics
stratified random sample
pre existing groups of population, representative entire population
cluster random sample
population split into layers that can be selected
neighbourhood, street, houses
multi stage random sample
voluntary sample
chose if want to participate in study
easy access population
convenience sample
numerical data
continuous or discrete
categorical data
ordin vs nominal
ordin- ranked in a logical way
nominal- no order/simple
population vs sample
population- entire collection of people
sample- smaller group of collected sample
representative
represent population from results
reliability vs validity
realiability- consistency of the results
validity- conclusion of a study repersent the claimed population
microdata vs aggregate data
microdata- all responses
aggregate- data summarized and altered
lerking variable
hidden additional factor significantly influences results
- data divided and grouped in any number of ways
-carefully identify the best way after study the situations
misleading data
- disorting scale
- timeline (exclude major event, impact data-make look stronger)
experimental study
research controls the study
-treatment group, and control group
control variable
the only part of the experiment that is different- all other part of the experiment should be the same
that way can tell the effect of the experiment
observational study
situation that are already occurring/ able to observe and make predictions
