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## Notes 1-14-15

1 review
by: Jason Alan Schuller

35

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# Notes 1-14-15

Jason Alan Schuller
ASU
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One Day of Notes
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## 1

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"If Jason isn't already a tutor, they should be. Haven't had any of this stuff explained to me as clearly as this was. I appreciate the help!"
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## Popular in Department

This 2 page One Day of Notes was uploaded by Jason Alan Schuller on Wednesday January 21, 2015. The One Day of Notes belongs to a course at Arizona State University taught by a professor in Fall. Since its upload, it has received 35 views.

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## Reviews for Notes 1-14-15

If Jason isn't already a tutor, they should be. Haven't had any of this stuff explained to me as clearly as this was. I appreciate the help!

-Zola Schinner

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Date Created: 01/21/15
Jason Schuller Lecture Notes 11415 ABS 350 Applied Statistics Introduction Lectures Dr Ulrich De nition of Statistics that professor likes best is the analysis of variance Variance vs Variability variability considers how things are different it s scriptive and somewhat subjective Variance is a numerical measure of variability so we can look at this value PROFESSORS PREDICTION THE AVERAGE CLASS HEIGHT IS 5 7quot Extra credit at end of semester quotAll data are facts but not all facts are dataquot Imagine a cloud and we call it a population It is what we care about in statistics Individuals aren39t interesting in our studies of statistics just because we see one thing differently doesn39t mean everything is different A population is any set of people or things of interest From the cloud we slice out a piece of it called a sample A sample is simply a portion of a population The smallest sample size we can have is 1 but it is better that we have a sample of at least 2 The max sample we can have is the population limit A demographic is anything that identi es you as an individual A reason why we sample is so that we can save money Things we care about in populations are called parameters which is a way to characterize or describe a population so for us a parameter is to be treated as numerical So so as to save ourselves money we take a sample out of the population and start manipulating the data to generate statistics which in turn are used as estimates of our parameters quotSample Statistics are estimates of Pooulation Parameters which is what we care aboutquot Second Extra Credit What is the smallest named unit of length What does that name have to do with Johnny Depp Planck39s Length and Johnny Depp is associated with it because of his role in the Pirates of the Caribbean where he had to walk the quotPlanckquot We can divvy up data as either Qualitative quality how well is subjective Quantitative quantity how much or how many of something is objective We can also nd things to be discrete data or continuous data Discrete tends to counted This is separate and distinct We are talking about whole numbers which includes 0 but that doesn39t mean our sample size is 0 Numbers needs to be greater than or equal to 0 Continuous tends to be measured Here we are talking about Fractions Numbers need to be real

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