presentation qual data

Question 1

tables

Answer 1

Quantitative data (raw scores) is converted to descriptive statistics and can be summarised in a table. Comments/conclusions are then included in a summary paragraph.

Question 2

bar charts

Answer 2

A type of graph in which the frequency of each variable is represented by the height of separated bars

Question 3

histogram

Answer 3

A type of graph in which the area of each bar represents frequency. The x-axis starts at true zero and is continuous.

Question 4

scattergrams

Answer 4

A graph that represents the strength and direction of a relationship between co-variables

Question 5

normal distribution

Answer 5

A symmetrical bell-shaped curve in which most people occupy the middle area and the mean, median and mode are all at the same central point. Many characteristics in a population, for example, height, weight and IQ are normally distributed.

Question 6

skewed distributions

Answer 6

A positive skew is when most of the distribution is concentrated on the left (and may be the result of a very difficult test) and a negative skew is when most of the distribution is on the right (the result of a very easy test).