Frequency Distribution and Their Graphs (2.1)

Front

What is a frequency distribution?

Back

A frequency distribution is a summary of how often different values occur in a dataset, typically displayed in a table or graph.

Front

What is the purpose of an ogive?

Back

An ogive is a graph that represents the cumulative frequency of a dataset, showing how many data points fall below a certain value.

Front

How do you calculate the midpoint of a class interval?

Back

The midpoint is calculated by averaging the lower and upper boundaries of the class interval.

Front

What is relative frequency?

Back

Relative frequency is the ratio of the frequency of a particular value to the total number of values in the dataset, often expressed as a fraction or percentage.

Front

What distinguishes a histogram from a bar graph?

Back

A histogram displays numerical data using intervals, while a bar graph displays categorical data.

Front

What is the formula for calculating relative frequency?

Back

The formula for relative frequency is f/N, where f is the frequency of the class and N is the total number of observations.

Front

What is a class width in a frequency distribution?

Back

Class width is the difference between the upper and lower boundaries of a class interval.

Front

Why is it important for class widths to be consistent in a frequency distribution?

Back

Consistent class widths ensure that the data is accurately represented and allows for meaningful comparisons between classes.

Front

What is a cumulative frequency?

Back

Cumulative frequency is the sum of the frequencies for all classes up to a certain point, showing the total number of observations that fall below a specific value.

Front

How do you create a frequency table?

Back

To create a frequency table, list the data values or intervals, count how many times each value or interval occurs, and record these counts.