Inferential statistics

Question 1

What does the abbreviation P stand for

Answer 1

Probability

Question 2

Inferential tests draw inferences from ?

Answer 2

A research sample to the population

Question 3

Data that are measured using units of equal measurements are

Answer 3

Interval data

Question 4

The test statistic calculated for Wilcoxon’s test is

Answer 4

T

Question 5

The abbreviations dF stands for

Answer 5

Degrees of freedom

Question 6

Generally the abbreviations dF is equivalent to

Answer 6

Number of participants in a study

Question 7

The significance level most commonly used in psychology is what percent

Answer 7

5%

Question 8

A type II error occurs when 17

Answer 8

The alternate hypothesis is wrong

Question 9

A type I error is a

Answer 9

False positive

Question 10

How else might you write a 5%

Answer 10

0.05

Question 11

Data that are in categories are called

Answer 11

Nominal data

Question 12

Data from a rating scale are strictly speaking are

Answer 12

Ordinal data

Question 13

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

Answer 13

Too high

Question 14

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

Answer 14

Spearmen’s rank order correlation test

Question 15

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

Answer 15

Wilcoxon T test

Question 16

what are inferential statistics based on?

Answer 16

probability

Question 17

what is a chi squared test

Answer 17

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

Question 18

what is the mann whitney U test

Answer 18

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

Question 19

the sign test

Answer 19

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

Question 20

What are nominal data

Answer 20

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

Question 21

What are ordinal data

Answer 21

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

Question 22

What are interval and ratio data

Answer 22

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

Question 23

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

Answer 23

noir