Presentation of Quantitative Data

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

Bar Chart: A type of graph in which the frequency of each variable is represented by the height of the bars.

Histogram: A type of graph which shows frequency but the area of the bars represents frequency. The x-axis must start at a true zero and the scale is continuous.

Normal Distribution: A symmetrical spread of frequency data that forms a bell-shaped pattern. The mean, median and mode are all located at the highest peak.

Skewed Distribution: A spread of frequency data that is not symmetrical, where the data clusters to one end.

Positive Skew: A type of frequency distribution in which the long tail is on the positive (right) side of the peak and most of the distribution is concentrated on the right.

Negative Skew: A type of frequency distribution in which the long tail is on the negative (left) side of the peak and most of the distribution is concentrated on the right.