STAB22H3 Lecture Notes - Canadian Food Inspection Agency, Health Canada, Eth

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STATISTICS (CHAPTER READINGS)
CHAPTER 1 - STATS STARTS HERE!
- Statistics helps us to see the world more clearly & accurately.
So, What is (Are) Statistics?
[GBOX]
What is Statistics? (sing. form)
- way of reasoning that uses collection of tools & methods to help comprehend the world
What are Statistics? (pl. form)
- specific calculations made from data
What are data?
- datum is sing. form
- values, but it takes into acc't the context they came in
[GBOX]
[1]
- very conspicuous to see ppl collecting data from us, about us
- ex. UPS - collects data for every package it ships & delivers and puts it all together in a
large database
[2]
Statistics
- helps w/ making sense of the complicated world we live in
- ex. by evaluating risk of GM foods that Canadian Food Inspection Agency is looking
into
- ex. by evaluating safety & effectiveness of new drugs sent for approval to Health
Canada
- ex. predicting # of AIDs cases
- ex. #customers likely to respond to sale in mall
- this discipline is needed whenever
- data is involved
- there is need to comprehend world
Statistics in a Word
[3]
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- Statistics is about VARIATION
- data varies b/c
- we aren't able to observe eth
- what is measured and is observed, it is done imperfectly
(b/c humans are not perfect)
- Statistics helps us to work with this variation by:
- understanding it
- modelling it
=> by doing this, can see thro it, thereby deciphering the underlying truths & patterns
An. seeing forest thro. trees
- What is a central challenge of the Statistics discipline is making sense of variations in data
[4]
How does this Book Help?
- what is done w/ data can be better comprehended if pic's are made for it
- book goes thro. entire process of
- thinking about prob
- finding & showing results
- telling others about discovery
>- each step has data displayed to improve comprehension & insight
- how to best comprehend Statistics is when it is put to use
[5]
3 Steps to doing Statistics correctly
- THINK
- know how you are going to progress & why
- SHOW
- the actual doing of calculations, and making displays of data
- not the most impt pt
- TELL
- ... about what has been learned
- cannot properly have done Statistics unless you have explained results to some1 that can
comprehend conclusions that came from it
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[6]
Where are we going? section
- comes at every chapter's beginning
- real-world questions that will be addressed w/ statistics and be doable after chapter is
over
Step-by-Step section
- aka worked example
- applies new concepts learned in chapter
For Example box
- gives concise way of applying just-learnt ideas & methods
- give an idea as to how statisticans approach and solve prob's
- show how to think about prob, what to show, and how to tell what it all means
[7]
Just Checking section
- few short q's w/ little calculation
- fast way to make sure you have understood chapter's basic ideas
- ans's for these q's at end of chapter
[8]
MATH Box
- understanding impt concepts is helped by knowing formulas & protocols for Statistics,
and why they work in the case they are used
- gives concise, clear explanation of math that supports the statistical method used
[9]
ActivStats box
- signalling that the multimedia available in DVD can help better understand what is
being said for this paragraph/section etc.
- look for corresponding activity in chapter on DVD
[10]
What can Go Wrong?
- helps to avoid common mistakes
- that often come from
- using method in wrong context
- misinterpretation of results
- can help cope with challenge that there is multiple right ans's in Statistics
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Document Summary

Statistics helps us to see the world more clearly & accurately. Way of reasoning that uses collection of tools & methods to help comprehend the world. Values, but it takes into acc"t the context they came in. Very conspicuous to see ppl collecting data from us, about us large database. Helps w/ making sense of the complicated world we live in into. #customers likely to respond to sale in mall. Ups - collects data for every package it ships & delivers and puts it all together in a. Ex. by evaluating risk of gm foods that canadian food inspection agency is looking. Ex. by evaluating safety & effectiveness of new drugs sent for approval to health. What is measured and is observed, it is done. Statistics is about variation (b/c humans are not perfect) Statistics helps us to work with this variation by: => by doing this, can see thro it, thereby deciphering the underlying truths & patterns.

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