Graphical Representation

Question 1

What do you get marks for when drawing graphs:

Answer 1

1) Title - operationalised variables and units if applicable
1)1) Labelling the acis - operationalised and units if applicable
1) accurate plotting
+ scale needs to make sense

Question 2

Bar Charts:

Answer 2

• bars should never touch bc they are discreet
• bars and gaps should be same width
• used for catagorical variables
• used for independant catagory

Question 3

Histogram:

Answer 3

• used for continous data (one variable)
• divided in BINS (fixed intervals the data is split into)
• x axis = numerical data groupings
• y axis = frequency
• bars from each catagory should touch because they are continous
• width is the same

Question 4

Line Graphs:

Answer 4

• used for ordinal/interval data (numerical)
• used for continous data
• x axis = numerical data groupings in equal sized intervals
• y axis = frequency / scores etc
• a continous line should connect up all the data points

Question 5

Scatter Graphs/ Scattergrams:

Answer 5

• used for correlations
• used for correlational data
• data from two co-variables on each axis are obtained for each ppt and plotted as a point/cross
• a line of best fit may be drawn which has an equal number of points on each side
• can show: - direction of correlation (positive/negative) + strength of correlation (no/weak/moderate/strong)
• do not include ppt number
• use central tendency terms in axis and title