Stats Pre test Chapter 2

What is the difference between a frequency polygon and an ogive?

A frequency polygon displays class frequencies while an ogive displays cumulative frequencies.

An Ogive is a graph that displays relative frequencies.

False . An Ogive is a graph that displays cumulative frequencies

What are some benefits of representing data sets using frequency distributions? What are some benefits of using graphs of frequency distributions?

Organizing the data into a frequency distribution can make patterns within the data more evident. It can be easier to identify patterns of a data set by looking at a graph of the frequency distribution.

What is the difference between relative and cumlative frequency?

Relative frequency of a class is the percentage of the data that falls in that class, while cumulative frequency of a class is the sum of the frequencies of that class and all previous classes.

Why should the number of classes in a frequency distribution be between 5 and 20?

If the number of classes in a frequency is not between 5 and 20, it may be difficult to detect any pattern.