Display Of Quantative Data And Distributions

What is a scattergram?

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

What is a bar chart?

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

When are bar charts used?

When data is divided into categories.

What is data called when it can be divided into categories?

Discrete data.

What are the two other types of graphs?

Histograms and line graphs.

What is a histogram?

A type of graph where the bars touch each other, showing that the data is continuous rather than discrete. The x-axis is made up of equal sized intervals of a single category.

What is a line graph?

Graphs that also represent continuous data and use points connected by lines to show how something changes in value, for instance, over time.

What is one way of representing data?

In the form of a summary table.

in a summary table, are the values raw scores?

No.

What are raw scores converted to?

Descriptive statistics.

What is a normal distribution?

A symmetrical spread of frequency data that forms a bell-shaped pattern.

What happens within a normal distribution?

Most people are located in the middle area of the curve with very few at the extreme ends.

In a normal distribution, where are the mean, median and mode located?

At the highest peak.

What is a skewed distributuion?

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

What is meant by a positive skew?

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

In a positive skew, where are the mean, mode and median located?

The mode remains at the highest point of the peak, followed by the median and the mean is dragged to the right.

What is meant by a negative skew?

A type of 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.

In a negative skew, where are the mean, mode and median located?

The mode is at the highest point of the peak, followed by the median and the mean is pulled to the left.