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Psychology A2 Research Methods > Inferential statistics > Flashcards

Flashcards in Inferential statistics Deck (23):
1

What does the abbreviation P stand for

Probability

2

Inferential tests draw inferences from ?

A research sample to the population

3

Data that are measured using units of equal measurements are

Interval data

4

The test statistic calculated for Wilcoxon's test is

T

5

The abbreviations dF stands for

Degrees of freedom

6

Generally the abbreviations dF is equivalent to

Number of participants in a study

7

The significance level most commonly used in psychology is what percent

5%

8

A type II error occurs when 17

The alternate hypothesis is wrong

9

A type I error is a

False positive

10

How else might you write a 5%

0.05

11

Data that are in categories are called

Nominal data

12

Data from a rating scale are strictly speaking are

Ordinal data

13

A type II error is more likely to happen when the required significance level is

Too high

14

What would be the appropriate test to select interview conducted a study with ordinal data and requiring a correlational analysis

Spearmen's rank order correlation test

15

What would be the appropriate tested to select if you conducted an experiment with a repeated measures design and ordinal level data 19

Wilcoxon T test

16

what are inferential statistics based on?

probability

17

what is a chi squared test

we use this test when we we have counted how many occurences there are in each category ...called frequency data. This test can be used to investigate a difference or an association

18

what is the mann whitney U test

this is a test of difference to be used when there are independent groups i.e. where a study involves two groups of participants and each group is given a different level of the independent variable

19

the sign test

this is another test of difference - this is used when analysing nominal data collected in a study with a repeated measures design

20

What are nominal data

Data in separate categories such as grouping people in your class according to their height. Within each category we have a count of how many people are items are in that category. This is frequency data

21

What are ordinal data

Data are ordered in some way for example each person in your class lines up in order of size the difference between each person is not the same. Data that are ranked are ordinal measurements the intervals between first second third example are equal but each rank represent items which are not equally separate

22

What are interval and ratio data

Data are measured using units of equal intervals such as measuring everyone's height in centimetres such units of measurement have equal intervals therefore the level of measurement is more precise. A ratio scale has a true zero whereas an interval scale does not. For example the Celsius temperature scale doesn't have a true zero

23

What is an acronym to help remember the four levels of measurement of data

noir