Research Methods : Presentation of Quantitative Data

Question 1

when tables appear in results section of a report key to note

Answer 1

not merely raw scores

converted to descropitive statistics

Question 2

data can be represented visually uisng a suitable groahical display soo

Answer 2

diffrence in mean value easily seen

Question 3

bar charts used when

Answer 3

data divided into categories aka discrete data / two conditions

Question 4

why are bars sepreated on a bar chart

Answer 4

show dealing with seerate conditions

Question 5

why do bars touch each other in histograms

Answer 5

shows x axis data continuos

Question 6

x axis in histogram represnts

y axis in histogram represents

Answer 6

y - frequency

x - percentage scores in maths test

Question 7

scattergram

Answer 7

show associations between co variables

Question 8

how is the x /y axis on scattergrams

Answer 8

either of co variables doesnt matter which way

Question 9

each point on scattergram reps

Answer 9

x and y position of co variables

Question 10

measuring certain variables forms waht type of cuerve

Answer 10

bell shaoed

Question 11

normal distrobution

Answer 11

symmetrical spreadof frequency data that forms a bell shaped pattern

Question 12

describe how people allocated in normal distribution

Answer 12

located in middle with very few people at extreme ends

Question 13

where are mean median mode in normal distribution

Answer 13

same midpoint of curve

Question 14

in normal distribution what do tails of the curve do and why

Answer 14

extend outwards never touch the horizontal x axis

as most extreme scores theoritically possible

Question 15

skewed distribution

Answer 15

spread frequency data unsymetrical where data clusters to one end

Question 16

positive skew

Answer 16

most distribution concentrated towards left of the graph

long tail on the right

Question 17

where is 
mode
median 
mean 
 on a positive skew

Answer 17

mode - highest point of the peak

median - next

mean - dragged toward tail

Question 18

why are the mean mode median affcted differntly

Answer 18

mean - distorted by extreme meausre

median and mode dont include all score so less affected

Question 19

negative skew

Answer 19

e.g everyone did well distribution of data concentrated towards the right

long tail of anamoulus scores towards teh left

Question 20

where is mean oulled on negative skew

Answer 20

left due to lower result in minority

Question 21

where is mode on negative skew and where is median

Answer 21

mode - highest peak

median - in the middle