Data Analysis: Graphs

Question 1

explain ‘summarising data in a table’?

Answer 1

• used to present descriptive statistics that have been generated from raw data
• usually include reference to both measures of central tendency used
• look at flashcards

Question 2

explain ‘bar charts’?

Answer 2

• visual representation of data
• needs title
• x axis= desscreet data =iv
• y axis= continuous data= dv
• both axis labelled with units
• gaps between bars
• look at flashcards

Question 3

explain ‘scattergrams’?

Answer 3

• doesn’t depict differences but associations between co-variables
• doesn’t matter which is on the x or y axis
• look at flashcards

Question 4

explain ‘histograms’?

Answer 4

• title
• axis like bar chart
• axis labelled
• bars MUST TOUCH
• height can vary to represent frequency

Question 5

explain normal distributions?

Answer 5

• bell shaped curve
• mean. median and mode all meet at the top of the curve
• only this shape with LOADS of pp’s
• look at flashcards

Question 6

explain positively skewed distributions?

Answer 6

• mean on the RIGHT OF THE MODE
• most of the distribution is on the left
• y axis always freq!!!
• (hard test=most get low marks and few get high marks)
• FLASHCARDS

Question 7

explain negatively skewed distributions?

Answer 7

-mean of the LEFT OF THE MODE (lower than the mode)
-distribution towards the right
-(easy test- most get high
scores few get low scores)
-FLASHCARDS