graphs

Question 1

tables

Answer 1

quantitative data (raw scores) converted to descriptive statistics that can be summarised in a table. comments/conclusions then included in a summary paragraph.

Question 2

bar chart

Answer 2

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

Question 3

bar chart uses

Answer 3

for visual representation of data using suitable graphical display so difference in mean values can easily be seen.
used when data divided into categories (discrete data).

Question 4

scattergram

Answer 4

a type of graph that represents the strength and direction of a relationship between co-variables in a correlational analysis

Question 5

scattergrams uses

Answer 5

correlations.
depict associations (not differences) between co-variables.

Question 6

normal distribution

Answer 6

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

Question 7

skewed distributions

Answer 7

positive skew- when most of the distribution is concentrated on the left. may be the result of a very difficult test.

negative view- most of the distribution on the right. may be very easy test.