How To: Calculate variance in a set of data
The video is about how to find the variance of the set of data. They found the variance by using the variance formula. Variance formula was represented by square of S, whereas S is the Standard Deviation.
The video is about how to find the variance of the set of data. They found the variance by using the variance formula. Variance formula was represented by square of S, whereas S is the Standard Deviation.
Do you have the perfect timing? Timing your swing is important, but sometimes a clock can do a whole lot more to help your golf swing. By imagining the face of a clock, you can effectively train your body to calculate the proper swing length for shots from various distances. Sound intriguing? Let Doug Hammer, PGA, show you the way. Watch this video golf tutorial and learn how to clock wedge shots.
You may not know it, but the IPv4 address of your computer contains tons of useful information about whatever Wi-Fi network you're on. By knowing what your IPv4 address and subnet mask are telling you, you can easily scan the whole network range, locate the router, and discover other devices on the same network.
Time-lapse videos are a recent phenomenon to the mainstream audience—in movies, on television shows, and even in commercial ads. These sped-up and blurred images are a microcosm of many of our lives in which we're constantly in a hurry to get somewhere. We like everything fast: our work, our coffee, and our news.
When you need to crunch numbers quickly — and I mean really quickly — there's a cool method you can use to multiply two numbers together in just a few seconds.
NASA -- the National Aeronautics and Space Administration, the United States government's most infamous agency, the powerhouse of space exploration -- teaches you the basics of Isaac Newton's Laws of Motion. Who better to learn motion theory from than NASA?
Long-time packeteer Bob Bruninga, WB4APR, developed the Automatic Packet Reporting System (APRS), which allows packet radio to track real-time events. It deviates markedly from the usual message- and text-transfer activity. Instead, APRS concentrates on the graphic display of station and object locations and movements.
Systm is the Do It Yourself show designed for the common geek who wants to quickly and easily learn how to dive into the latest and hottest tech projects. We will help you avoid pitfalls and get your project up and running fast. Search Systm on WonderHowTo for more DIY episodes from this Revision3 show.
Video: . Recycle your hard drive into a hidden flash memory device that only you know how to turn on and use in secret. This DIY hack project allows you to recycle your broken hard drives back to life and turn them into something useful.
We can calculate the area of the simple polygons like square, rectangle, triangle, pretty easily. Area of square can be calculated by drawing it on a graph paper, of unit cm length and breadth. Area of a rectangle is length X breadth. Area of a triangle is 1/2bh, half of product of base and height. For a parallelogram , area is the product of base and height. For a trapezoid , it is 1/2(b1+b2)h. For some other extreme polygons, we can calculate the area by making it different simple polygons ...
Learn how to calculate percentages with this easy video tutorial! One of the easiest way to calculate percentages is as follows:
When it's time to calculate a tip at a restaurant or bar, I usually try some mental math at first, but sometimes I resort to opening the Calculator quickly from the Control Center on my iPhone and doing a quick calculation. But with Apple's Shortcuts app, there's an even easier way, and you don't even have to leave your lock screen to get the results.
Making yogurt at home doesn't sound like an easy task at first. We initially saw it as detailed, hands-on, and precise—a process that required special equipment, specialized (and expensive) live-culture bacteria, and loads of yogurt knowledge.
Want to know about Newton's three laws of motion and how they affect aircraft landings? NASA has answers. NASA, aka the National Aeronautics and Space Administration, tells how Newton's laws apply to landings. There's no better place to learn from than the juggernaut of space exploration.
This video shows you how to create a continuous, daisy-chain necklace. The materials used include: size 11 rock eyes in yellow, red and purple, a toggle clasp , 9mm thread and a size 10 beading needle. Start by sewing on one half of the clasp, tying a knot to hold it in place. Be sure to leave the tail ends long enough to be able to re-thread it later with a needle to sew the tail ends. The video then shows the precise order in which the various beads are threaded through to produce a chain i...
Purchase a silver XBox 360 faceplate from your local gaming retailer. You can also remove the faceplate currently on your XBox 360.
The video is from the DJ tutorial and it shows us the basic principles of scratching for the beginners. And the first lesson you should learn is that there are basically four movements and here you will actually be not going to scratch put will be moving the record forward and backward. These four moves form the basis for starting to learn scratching. First you need are the type of sounds which are either acapella (song with no music) or with sounds (tracks with breaks on it). Before starting...
Using fresh herbs is always the best call for any recipe, but if you're an herb gardener with load after neverending load of herbs that you can't find a use for right now, drying these herbs may be your best option.
This video tutorial from adamstechvids shows how to resize photos in Windows using Picasa application.
This video shows you how to make an overall or jump suit for your doll. It is suitable for both boy and girl dolls. Take some material, plain or patterned. You need two buttons or studs for decoration. Make a square of material about 13cm by 13cm. It does not have to be precise. Fold it in half. Mark 5cm at one edge and 4cm at the other. Join up the marks and cut out the shape. Make another one the same, and sew the two together. Fold and sew the waist. For the front patch cut two layers 5cm ...
1) Make sure the paper used to make the origami water lily is a true square. One can use the paper one happens to have on hand, but anything heavier than lined notebook paper is best. 2) Work on a flat and hard surface so that all creases and folds are precise. 3) Place the paper square on the flat, hard surface so that the edges are facing in every direction. Be sure to have the colored side down if the paper is two sided. 4) Fold the paper in half from top to bottom. Crease the fold then un...
Making a batch of candy this holiday season? To make a successful batch of candy, you need the precise temperature, consistency, and timing during the cooking process. Watch this video to learn how to use a candy thermometer.
Sushi is one of the fastest-growing cuisines across the globe. To become a true citizen of the world, prepare yourself with this primer on sushi-eating rituals. Watch this how to video to learn how to properly eat sushi.
Fix those little scratches before they become big rust marks. Learn how to fix a scratch on your car. Howcast prevents all the necessary steps for ridding your car of that ugly scratch.
Learn how to find south, your latitude, and your longitude with only a few household items and some know-how, just by watching this science video tutorial. However, if using the homemade quadrant cited, the precision of your findings will be rather low. Don't worry, you'll be within a few hundred miles though.
A CNC router machine is probably the most useful tool a hobbyist can own, but the price for a CNC machine on the market is way more than the average hobbyist is willing to spend. You can build your own CNC with very basic tools, little knowledge of machinery, mechanics, or electronics, but be warned, these machines are inherently dangerous, so wear the proper protection and use common sense. At the very least, read the instructions and precautions on every tool you use.
Making a ceramic covered jar requires precise measurements for a properly fitting lid. Learn how to throw a covered jar on the potter's wheel with this free ceramics video series.
Written instructions on how to draft a basic skirt pattern with accompanying video. Take your correct measurements before you begin.
This video gives a step by step tutorial showing how to calculate the area of a triangle. This is a great video to help children with their homework.
If your idea of jewelry making is simply strining on glass beads and vintage knick knacks onto a string and then adding a clasp, then you have some serious learning to do. While in the end creativity trumps all, it's important for many intricate projects that you calculate exactly how much of one particular stone or filigree stamp you need. And in order to do that, you must measure them.
New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 664th installment in their series of digital spreadsheet magic tricks, you'll learn how about how the new Excel 2010 AGGREGATE function that can calculate these 19 different functions depending on what number you put into the 1st argument of the AGGREGATE function. This is an improvement over the SUBTOTAL function wh...
Leigh Ramsdell and Hal Brindley with The Environmentals discuss how to build a worm composting bin. To build a worm composting bin, you will need a plastic tub or a box with a lid. Calculate one square foot of surface area per pound of worms. A pound of worms can process a half a pound of food per day. Worms need air so put holes in your bin on the top and sides. Also put holes on the bottom for drainage so your worms don't drown and die. Add screens to cover the holes. Put bricks on the bott...
If you've ever had a little trouble trying to program your calculator, you may find a little relief with this four-part video tutorial. Here, a Texas Instruments (TI-84 Plus) calculator will be used to explain the programming process. The four parts include:
Whether you're interested in learning Microsoft Excel from the bottom up or just looking to pick up a few tips and tricks, you've come to the right place. In this tutorial from everyone's favorite digital spreadsheet guru, ExcelIsFun, the 47th installment in his "Highline Excel Class" series of free video Excel lessons, you'll learn how to use the PMT function to calculate payments. Specifically, this video addresses the following topics:
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 ExcelsFun, the 50th installment in his "Excel Statistics" series of free video lessons, you'll learn the basics of probability:
First of all cut of the top and the bottom of the cylinder to get two circles. Now take a scissors and cut of the cylinder into two halves from the top to the bottom as shown. Now you get a rectangle shape. You can easily measure the length of the cylinder but to measure the base is a problem. So mark a point on the table with tape and also make a mark on the can or the object you want to measure. Now place the two points over each other. Now use a ruler as a guide and move the can so that th...
In this video the author shows how to do similarity transformations. He says that similarity transformations are used to draw the similar images at a different location and the k value is most important while doing this kind of transformation. He says that a negative k value tells that the copy of the shape will end at the opposite side of the origin to the original shape. He says that a positive k value tells that the copy will lie on the same side of the origin. Next thing about the k value...
In this six-part video tutorial, learn how to create an access database. The following six parts go over the following:
Mario hacks, cheats, glitches. How to play and hack the flash game Mario Games. Watch this video tutorial to learn how to hack Mario Games with Cheat Engine 5.5 (09/30/09). Download Cheat Engine.
Find out how everything in a chemistry lab works, from pipettes to burners to recrystallization to storage. You'll get precise instructions on how to work and perform certain scientific duties in the chem lab, whether it's chemical or just ordinary high school science.