statistics

Question 1

name 4 different variables

Answer 1

• interval
• nominal
• ordinal
• ratio

Question 2

what does nominal data consist of

Answer 2

discrete types of things (nouns)

Question 3

what does ordinal data consist of

Answer 3

a ranked scale, e.g
- always, never, sometimes

Question 4

what does interval data consist of

Answer 4

a numeric scale with NO TRUE ZERO VALUE

Question 5

what is ratio data

Answer 5

numeric scale that includes ZERO

Question 6

what is a numeric variable that is continuos with examples

Answer 6

can take any value in a certain set of values e.g temp, height, age

Question 7

how are variables and values different

Answer 7

variable- the way that people in situations can vary
values- each instance has a single value for each variable

Question 8

what is a numeric variable that is discrete with examples

Answer 8

can only take whole numbers e.g number of children

Question 9

what kind of graph would be used for a numeric variable

Answer 9

histogram

Question 10

what are three ways of reporting central tendency

Answer 10

mean, median, mode

Question 11

what data used for nominal, ordinal, interval and ratio (mode, median, mean)

Answer 11

n- mode
o- mode and median
i- all
r- all

Question 12

what are 4 variability measures (includes IQR)

Answer 12

• range
• inter quratile range
• variance
• standard deviation

Question 13

what variability measure used in nominal, ordinal, interval and ratio

Answer 13

n- none
o- range and IQR
i- all
r- all

Question 14

what units is variance in

Answer 14

cm2

Question 15

what is s.d?

Answer 15

the square root of variance

Question 16

categorical variables can be measured using…

Answer 16

nominal and ordinal scales

Question 17

numerical variables can be measured using….

Answer 17

interval or ratio scales

Question 18

what does s.d allow us to do?

Answer 18

see how spread out around the mean scores are in the data

Question 19

what plot is used for quantitative data

Answer 19

graphically- scatter plot

Question 20

qualitative data?

Answer 20

non- numerical info
- dont examine variables
- examines constructs, phenomonea and processes

Question 21

quantitative data?

Answer 21

• numerical measures
• allows stats to be calculated
• observed through surveys, experiemnts etc
• e.g weight, height, temp
• finds trends, relationships and associations in data sets

Question 22

definition of a casual hypothesis

Answer 22

formal statement predicitng specific change in one thing will produce specific change in another

Question 23

why is there no independant variables in a correlational design

Answer 23

variables are not manipulated

Question 24

univariate data

Answer 24

info that involves only one variable, allows analysis of single aspect without considering other variables

Question 25

bivariate data

Answer 25

2 variable, allows examination of relationship between 2 variables

Question 26

how is nominal values displayed

Answer 26

bar chart

Question 27

how are ordinal values displayed

Answer 27

bar chart

Question 28

what are interval values displayed

Answer 28

histogram

Question 29

how are ratio values displayed

Answer 29

histogram

Question 30

what is definition of variance

Answer 30

squared avergae distance between mean of all values in the data sample and the scores

Question 31

what is s.d

Answer 31

square root of variance

Question 32

in categorical data what 2 types of ways can you display this

Answer 32

-table cross tabulation
and
- bar chart

Question 33

in quantitaive data what way can you show data

Answer 33

scatter plot