Types of Data
The heights of people in the classroom
What is numerical data
Used to represent categorical data
What is a column graph
The difference between the lowest and highest value of a data set
What is the range
The second column of the frequency tables (usually)
What is the tally
The average score in a study of data
What is the mean
Color of peoples eyes in Year 9
What is categorical data
Used to represent numerical data
What is a histogram
75% of the study is above this point
What is the lower quartile
An addition of each of the parts of the data in the frequency table that builds on from the one before
What is cumulative frequency
This must be done prior to working out the median of a data set
What is ordering the data in ascending order
Post codes
What are categorical data
When all the data on the graph is spread out evenly
What is a symmetrical graph
The difference between the upper and lower quartiles that represents the middle 50% of the study
What is the inter quartile range
The amount of the data in each section of the frequency table, out of the total data collected
What is percentage frequency
When more two modes exist in a data set
What is bi-modal
What are categorical - ordinal data
When majority of the data in a graph is towards the left hand side
What is positively skewed
What is the IQR for the following data set:
23, 25, 34, 40
UQ: 37
LQ: 24
IQR: 37 - 24 = 13
A section of the frequency table that includes more than one value
What is class interval (or intervals)
Calculate the median of the following data:
2, 3, 7, 5, 8
Mean = 5
The number of recycling bins at the school
What is Numerical - discrete data
Most appropriate graph to use when we have two sets of data and want to display them next to each other
Back-to-back stem and leaf plot
What is the five figure summary for the following data set:
1, 1, 4, 5, 7, 8, 11, 13, 15, 16, 17, 18, 22, 27
LX = 1
LQ = 5
M = 12
UQ = 17
UX = 27