presentation of quantitative data

Question 1

tables

Answer 1

• raw scores converted to descriptive statistics

Question 2

scattergrams

Answer 2

scattergraph shows correlation between co-variables

- indicates strength + direction of correlation

Question 3

bar chart

Answer 3

• show frequency data for discrete (separate) variables

Question 4

distributions + skewness

Answer 4

• normal distribution = ball shaped curve = symmetrical = middle area of curve = mean, mode, median occupy same mid-point of the curve
• positive skew = most of the data is concentrated to left of the graph = mode remains highest point of peak, median next, mean dragged across to right
• negative skew = data concentrated to right of graph (opposite)