Box Plots Flashcards
1
Q
What is a box plot?
A
- A box plot illustrates a data set by showing the median and quantiles of a set of data as well as the highest and lowest values.
- Box plots are a clear way of summarising a set of data and showing its distribution
2
Q
What are the 5 sets of data you need on a box plot?
A
- min
- max
- lower quartile (Q1)
- median
- upper quartile (Q3)
3
Q
How do you use your calculator to find the min, median, max, lower and upper quartiles?
A
Press
- 6
- 1
- enter data into x column (leave freq column)
- AC
- OPTN
- 2
4
Q
How do you compare box plots?
A
- compare the average by comparing the medians
- compare the consistency of the data by comparing the IQ ranges
5
Q
What are the advantages of box plots?
A
- shows range, interquartile range, median and consistency
- shows the extent of how much data is skewed/leans in a particular direction
- useful for comparing 2 or more sets of data at a glance
6
Q
What are the disadvantages of box plots?
A
- finding quartiles without a calculator can be time consuming
- even with a calculator it is easy to make mistakes and large sets of data can take a long time to enter
