inzight insights in the beginning… whangarei pd day may 6 th 2013 jim hogan
TRANSCRIPT
My Goals TodayHave you gain confidence to explore this
software
Make you aware of where to find resources
Help you appreciate when to use iNZight
Become an iNZight user
Have fun being a learner again.
What are your goals?
Plan of Nec SlidesDownloading and installing on Mac or PC
Basic history, ownership and use
Starting it up
Data and variables
Graphs (dots, bars and boxes)
PPDAC and Inference
Discussion of when to use (and when not to use)
PPDAC and “on the second day…”
Downloading and InstallingDownload http://www.stat.auckland.ac.nz/~wild/
iNZight/, unzip and notice where you put it all.
To begin find the “START_INZIGHT.command”
Double click the ICON and way we go
Investigate this website!
iNZight History…iNZight has been primarily supported by The
University of Auckland, Department of Statistics
with additional support from Statistics New Zealand and the NZ Ministry of Education via Census at School NZwebsite
Useless info…it is written in R, which is a subset of S a global used computer language for statistics. oh…
…designed for our schoolsInitially designed for New Zealand high
schools, iNZight now extends to multivariable graphics, time series and linear models.
A simple data analysis system which encourages exploring what data is saying without the distractions of driving complex software
Getting dataI suggest that you import .csv files
After
“conditioning” the data in ExcelTaking a sampleGetting rid of nonsenseTidying and ordering
And so on.
Develop a system that works for you… .csv
Data and VariablesCategorical data are things like words. One
does not add words. Telephone numbers are categorical data. The sum of two telephone numbers does not mean a lot.
Numerical data can be added and multiplied. Numerical data can be converted to categorical data. Why might we do this?
PPDACAsk a sensible question
“I wonder if the weight of female trout in the Lake Taupo 1993 are heavier than the males?”
Why would I want to know this? Hmmmm…
ConclusionThe female trout in the 1993 Lake Taupo
are not heavier than the males.
The answer is not NO
The answer is not that there is no difference
The answer is not the males are heavier
ATFQ
The answer is as above.
A better question?I wonder if the trout caught by FF are bigger
than the trout caught by any other method.
Reason…I want to catch a big trout
Task, you answer this.
When to use iNZight…My view is
not before students are readythat means
when they tell you how to draw a dot plot and bar graph draw a box and whisker and tell you everything about it not before and can describe distributions using their eyes.
REASON ----------------
Reason Reason
This is very powerful software and they will take the short cut and use it before understanding what it all means. So if you want to create a rod for your own back then show them how to use it.
Year 7/8 – never
Year 9/10 – only when they are multiplicative, know fractions and can explain that 25% of the data is in each of box parts. What min, LQ, med, UQ, IQR, max all mean.
Year 11 – Use deeply.
Use any time as a teaching tool for visual stuff.