# Empirical

### How To : Use the Empirical Rule w/ standard normal distribution

In this video tutorial the instructor explains about the concepts of standard normal distribution and the empirical rule and how to use it to solve an exercise. He starts by explaining about standard normal deviation saying that in a standard normal deviation the value of mean ...more

### How To : Estimate probabilities with the empirical rule

Learn how to use the empirical rule (or 68-95-99.7 rule) to estimate probabilities for normal distributions in statistics. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, than ...more

### How To : Convert between empirical and metric units in basic math

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical sup ...more

### How To : Determine the empirical and molecular formulas for a compound in chemistry

In this free video science lesson from Internet pedagogical superstar Salman Khan, you'll learn how to determine the empircal and molecular formulas of a substance given percent composition. Whether you need help studying for that next big test or could just use a hand finishi ...more

### DIY Lab Equipment : Build Your Own Reflow Oven Out of a Toaster for Precision Temperature Soldering

Ever wonder how all of those tiny chips and components can fit inside your laptop or smartphone? If you tried to squeeze them in there yourself, your laptop would quickly become too heavy for your lap, and your mobile phone would need wheels to stay mobile. The secret to mini ...more

### How To : Create a PCB Etchant That Automatically Improves After Each Use

Etching your own circuit boards is tons of fun, but etching requires strong chemicals to dissolve the copper plating on blank circuit boards. The normal ferric chloride solution works well, but can be expensive and leaves permanent stains. Luckily, we can whip up our own etcha ...more

### News : 13 I-do-mean Hellacious Potato Gun how-to Articles

Here are the13 best articles on How to Build a Potato Gun. http://www.scribd.com/doc/15796837/To-Make-A-Spudgun-An-instructionally-informative-document-by-Enoctis Here was my process:  I chose among combustion based guns.  No pneumatics.  As a curator of the video site, Won ...more

### How To : Calculate molecular formula using molar mass

The man was requested to solve a short, basic chemistry exercise. He starts by explaining the meaning of the terms involved in the problem: molecular mass, empirical formula and molecular formula. He also explains the way the are connected, for a better understanding of the wa ...more

### How To : Work with bell curves in Microsoft Excel

If you use Microsoft Excel on a regular basis, odds are you work with numbers. Put those numbers to work. Statistical analysis allows you to find patterns, trends and probabilities within your data. In this MS Excel tutorial from everyone's favorite Excel guru, YouTube's Excel ...more

### How To : Work with Chebyshev's Theorem & bell curves in Excel

If you use Microsoft Excel on a regular basis, odds are you work with numbers. Put those numbers to work. Statistical analysis allows you to find patterns, trends and probabilities within your data. In this MS Excel tutorial from everyone's favorite Excel guru, YouTube's Excel ...more

### News : Dealing With Stress (Project Proposal)

Dealing With Stress My senior thesis project is going to be about stress. I want to learn how to educate others (my peers) throughout a web site about stress, what it is, how serious it is and how to deal with it. I will create a Wonder How To account where I am going to upda ...more

### How To : Write a literature review for thesis writers

In this tutorial, we learn how to write a literature review for thesis writers. The three elements are: discuss the most relevant theory, introduce and define key terms, and discuss recent research in the field. You will need to include the most important literature, quote dir ...more

### Today's Tidbit : Money Can't Buy Everything

Legal Services A group of lawyers refused to provide legal services to needy AARP members for \$30 per hour, but when asked to do it for free, they readily agreed. Nuclear Waste Storage The Swiss needed a place to store their nuclear waste. Lacking Yucca Mountain, they surve ...more

### News : Your New Shrink Is Only a Facebook Message Away with Stanford's New Chatbot

Getting support for your mental health is now as easy as opening up Facebook Messenger. By just opening up the Messenger app, you can connect to Woebot, a new chatbot developed at Stanford trained in administering cognitive behavioral therapy (CBT). The bot — developed by Dr. ...more

### How to Be an Intern : Why Every Intern Should BYOB

A week into my internship, I experienced pretty serious back pain and slight difficulty breathing. I scheduled a doctor's appointment to make sure nothing was wrong, and I got a surprising diagnosis: bad posture. Yep, slouching at my desk had caused all of my maladies. In an ...more

### News : Snapchat's Controversial Redesign Only Made It More Popular

As you've probably heard by now, Snapchat's new redesign isn't going over too hot with its users. Its stock plummeted last week when Kylie Jenner said she'd be moving on to more Instagram-y pastures. With all these factors, you'd probably assume that there is some empirical ev ...more

### News : Sage Proposal

Sergio Peralta Advisor: Jessica Davis English 3 23rd November 2011 Sage workshop My senior thesis project is creating a writing workshop. It will be called Sage Workshop and will be sponsored by Street Poets. This workshop will be located in FTA. It will be a workshop for ...more

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