Inferential statistics

Question 1

nominal data

Answer 1

what’s your favourite colour? answers pink/blue/green etc

Question 2

nominal/binary

Answer 2

what gender are you? male or female

Question 3

ordinal

Answer 3

strongly agree/strongly disagree

Question 4

scale

Answer 4

from 0%-100%

Question 5

inferential statistics

Answer 5

test hypothesis between dependant/independent variables, tests populations, decides whether something will happen by chance is significant or not

Question 6

dependant variable

Answer 6

its measured, caused by independant

Question 7

independent variable

Answer 7

one we are manipulating

Question 8

hypothesis

Answer 8

untested statement that tells us a relationship

Question 9

research/alternative hypothesis

Answer 9

what we aim to gather evidence from, usually a relationship, Hi

Question 10

null hypothesis

Answer 10

what we assume true from the beginning, no relationship, Ho, use inferential statistics to test against

Question 11

what do we aim to do with null

Answer 11

accept/reject so come up with alternative to test significance then try and reject

Question 12

what is being tested

Answer 12

Ho

Question 13

variable testing

Answer 13

X(-) - x

Question 14

ways to test null

Answer 14

estimate all values of statistic, use statistics with unknown pdf (chi-squared/f test)

Question 15

steps

Answer 15

define question, set null/alternative, calculate statistic, calculate p value, interpret

Question 16

what happens if p value larger than 5%

Answer 16

don’t reject Ho

Question 17

t tests

Answer 17

compare 2 populations, plot histograms, 2 plots for independent samples 1 for paired

Question 18

paired t test

Answer 18

individuals studied at 2 different times/conditions

Question 19

independent t tests

Answer 19

collected from 2 separate groups

Question 20

equal population variances

Answer 20

compare standard deviation