Chapter 3: Frequency Distribution and The Graphical Representation Of Data Flashcards
What’s a frequency table
It is a table with classes or intervals of values and corresponding frequencies
What is an array
An array is a dataset that has been sorted from smallest to largest
What is a range
It is the difference between the largest and smallest observations
What is the procedure of drawing up a frequency table
Steps:
1. Calculate the range
2. Determined the number of classes
3. Calculate the class width
4. Calculate the class boundaries
5. Tabulate the observations
What is the class midpoint
The class midpoint is that value that lies in the middle of each class interval
What are percentage frequencies
They are obtained by multiplying relative frequencies by 100
What is a histogram
It is a graphical representation of a frequency table
What is a frequency polygon
It is a graph with the frequencies of each class interval approaching against the class midpoints and the points are joint with straight lines
