Lesson 2.1: Constructing Frequency Distributions

Front

What is a frequency distribution?

Back

A frequency distribution is a summary of how often different values occur within a dataset, typically presented in a table format.

Front

What are class limits in a frequency distribution?

Back

Class limits define the range of values that fall into each category or class in a frequency distribution.

Front

How do you calculate the midpoint of a class interval?

Back

The midpoint is calculated by averaging the lower and upper class limits: (Lower Limit + Upper Limit) / 2.

Front

What is frequency (f) in a frequency distribution?

Back

Frequency (f) refers to the number of occurrences of data points within a specific class interval.

Front

What is relative frequency?

Back

Relative frequency is the ratio of the frequency of a class to the total number of data points, often expressed as a percentage.

Front

What is cumulative frequency?

Back

Cumulative frequency is the running total of frequencies up to a certain class interval, showing the number of observations below a particular value.

Front

What is the purpose of constructing a frequency distribution?

Back

The purpose is to organize and summarize data to make it easier to analyze and interpret.

Front

What is the difference between lower and upper class limits?

Back

Lower class limit is the smallest value in a class interval, while the upper class limit is the largest value in that interval.

Front

What is a class interval?

Back

A class interval is a range of values that groups data points in a frequency distribution.

Front

How do you determine the number of classes in a frequency distribution?

Back

The number of classes can be determined using Sturges' rule: k = 1 + 3.322 log(n), where k is the number of classes and n is the number of data points.