Year 1 Chapter 3: Representations Of Data Flashcards
1
Q
What is an outlier?
A
Any value greater than (Q3 + k(Q3 - Q1)) or less than (Q1 - k(Q3 - Q1)).
2
Q
What is meant by “cleaning the data”.
A
The process of removing anomalies from a data set.
3
Q
How do you calculate the height of each bar in a histogram?
A
The height of each bar corresponds to the frequency density.
area of bar = k x frequency
4
Q
How do you form a frequency polygon from a histogram?
A
Join the middle of the top of each bar.
5
Q
What do you comment on when comparing data sets?
A
A measure of location (e.g. median, IQR).
A measure of spread (e.g. standard deviation, mean).
