BrownMath.com → Statistics → Spr15 ME50

# MATH200/ME50, Statistics

Spring 2015, T 6:30–9:20, room 121C (Stan Brown)

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## What’s New

All news through 12 May Latest email to the class: 14 May

The links below are marked with helpful icons. A full explanation of the icons is available, and most browsers will also show a “tool tip” if you just hover your mouse over the icon.

Most of these “handouts” won’t actually be handed out. You can read them on the Web and decide whether you want a printed copy. If you see some old revision dates, don’t worry: some of them don’t need to change much from one semester to the next.

### Chapter 1: Statistics!

#### Optional extras

• Excel and your calculator generate pseudo-random numbers, but Random.org has lots of true random number generators, including numbers, coin flips, and dice rolls.
• Alternating Treatments by Steve Simon gives lots of examples why you need to randomize your samples.
• What’s wrong with surveys where respondents select themselves? See Web Polls by Steve Simon.

### Chapter 2: Graphing Your Data

#### Optional extras

• The Joy of Stats video: Hans Rosling shows lots of great ways to present data (accessed 2014-12-28). Don’t miss the segment “200 Countries, 200 Years, 4 Minutes”, also available separately (accessed 2014-12-28).
• just for fun: self-referential graphs
• The Best Stats You’ve Ever Seen video: Hans Rosling uses descriptive stats to explode the myth of First World and Third World (accessed 2014-12-28).
• MATH200A Program part 1 can be used to make histograms.
• ticalc.org has five programs to make pie charts. Though I haven't evaluated them in depth, PIEGRAPH.ZIP looks most interesting based on the screen shots.
• STEMLEAF.ZIP (1 KB) is a TI-83/84 program that makes stemplots

### Chapter 3: Numbers about Numbers

#### Optional extras

• How do we know there’s one best line? How does the calculator know what it is? See Least Squares — the Gory Details.
• If correlation is not Causation, how do we know that smoking causes cancer? Steve Simon tells you.
• Under Chapter 12 are several more inferences you can make about correlation and regression.

### Chapter 7: Normal Distributions

#### Optional extras

• What is a normal distribution? by Steve Simon gives an overview with diagrams. Near the bottom of the page there’s a downloadable spreadsheet that draws normal distributions.

### Chapter 8: How Samples Vary

#### Optional extras

• The Behavior of the Sample Mean by Gerald Dallal — pictures show how sample means are distributed and why that distribution is different from the shape of the population.