Multivariate Analysis
Problem + Plan
Write a Question
I wonder if Group 1 tends to have comparing word variable than Group 2 for population?
Extension: Make a hypothesis of what you expect to happen and why.
Examples:
1. I wonder if Year 10’s tend to be away from school more often than Year 9’s for MRGS?
2. I wonder if the Girl’s tend to be taller than the Boy's in Auckland?
Data
Analysis
Centre
In my sample I notice that Group 1’s median variable is comparing word than Group 2’s.
Evidence
Middle line in box
Median or Mean value
Spread
In my sample I notice that Group 1’s variable is more spread out than Group 2’s.
Evidence
Width of box
Interquartile Range (UQ-LQ)
Range
Shift + Overlap
In my sample I notice that the box for Group 1’s variable is shifted further up the scale than Group 2’s. There is ______ overlap.
Evidence
Location of box
Lower quartile / Upper quartile
Shape
Make sure it is comparative statement
Use correct vocabulary
o Symmetrical
o Uniform
o Bell shaped/Normally Distributed
o Right/Left skew
o Unimodal/Bimodal
Evidence
Identify where the mode/s are located.
Identify where most of the data lies between, or where the peak is.
Unusual Features
In my sample I notice….
Outliers
Gaps
Bimodal
Peaks
Groupings
Evidence
Identify where this feature is located in the data.
Give possible explanations of why this may occur.
Do not repeat if discussed in shape.
Conclusion
Refer back to the population.
Answer the question.
Use the word “tend”.
Evidence is whether one, or both medians falls inside or outside the other group’s box.
Ensure that your evidence is written in context.
From my sample I can say that Group 1 tends to be _____ than Group 2 for Population. This is because……
OR
From my sample I unable to say whether Group 1 or Group 2 variable tends to be comparing word for Population. This is because……
