Graphs

Question 1

Tables

Answer 1

Raw scores displayed in columns and rows.

A summary paragraph beneath the table explains the results

Question 2

Bar Chart

Answer 2

Categories (discrete data) are usually placed along the x-axis and frequency on the y-axis (or can be reversed).
The height of the column represents the frequency of that item

Question 3

Histogram

Answer 3

Bars touch each other- data is continuous rather than discrete.
There is a true zero

Question 4

Line Graph

Answer 4

Frequency on one axis, data on the other axis is continuous. The line often shows how something changes (eg over time)

Question 5

Scattergram

Answer 5

Used for correlational analysis. Each dot represents one pair of related data.
The data on both axis must be continuous

Question 6

Normal Distribution

Answer 6

Symmetrical, bell-shaped curve. Most people are in the middle area of the curve with very few at the extreme ends.
The mean, median and mode all occupy the same mid-point of the curve

Question 7

Skewed Distributions

Answer 7

Distributions that lean to one side or the other because most people are either at the lower or upper end of the distribution

Question 8

Negative Skew

Positions of mode, median and mean?

Answer 8

Most of the distribution is concentrated towards the right of the graph, resulting in a long tail on the left.

The mode is the highest point of the peak, the median comes next to the left, and the mean is dragged across to the left (if the scores are arranged from lowest to highest)

Question 9

Positive Skew

Positions of mode, median and mean?

Answer 9

Most of the distribution is concentrated towards the left of the graph, resulting in a long tail on the right.

The mode is the highest point of the peak, the median comes next to the right, and the mean is dragged across to the right (if scores are arranged from lowest to highest)