stats exam - lec 3 4 5

good questions are

simple, specific, sufficient

if a question is open ended, it is

qualitative

what are the three types of categorical data

ordinal, nominal, binary

categorical data is

bins of shi, bar graphable

ordinal

there is natural order to categories

nominal

there is no natural order to categories

bianary is when there is only

two options

quantitative data

has to be numbers, measured

two types of quantitative data are

discrete and continuous

discrete data is

counted, not measured, ex. number of courses youre taking

continuous data is

measured and very precise numbers, not whole numbers, every little number in between

data needs

structure

pre defined answers are

multiple choice

open ended answers are

qualitative

data

multiple pieces of info

dataset.

organized collection of pieces of info, on spreadsheet

database

searchable organized,

observational and cross sectional

dont interfere, do once

observational longitudinal

dont interfere and do multiple times

do you interfere in an observational study

no

do you do a longitudinal study once

no

do you do a longitudinal study more than once

yes

prospective is

looking into the future

retrospective is looking into the

past

experimental means you

have manipulated and control groups

experimental longitudinal can only be

prospective

observational longitudinal can be

pro or retro

prospective means the data will be collected

as the experiment unfolds

_________ —> construct —> items —> variables

idea

idea —> _______ —> items —> variables

construct

idea —> construct —> _______ —> variables

items

idea —> construct —> items —> ______

variables

________ are the items that make up the construct that allow the researcher to test the idea

variables

variables are the ______ that make up the construct that allow the researcher to test the idea

items

variables are the items that make up the ______ that allow the researcher to test the idea

construct

variables are the items that make up the construct that allow the researcher to test the _____

idea

“i wonder how much exercise a person needs” is am example of an

idea

exercise amount is an example of a

construct

a construct makes the idea

measurable

items become

variables

exercise times per week, intensity of activity, length of activity, type of activity are

items

is categotical data observational or experimental

observational

is continuous data experimental or observational

experimental

what type of study lets us measure if things are changing

prospective

all types of studies look at

if things are related and if things are different

what is being measured

variable