During the last few months, WhatsApp's Google Play Store ratings have been tanking—all the way down to an average of 3.4 stars from the instant messenger's usual average of 4.1. Within the last week, though, WhatsApp has received thousands of seemingly fake 5-star reviews that have bumped up the company's overall average to a 4.4.

Stan Taylor and his physics class at Miles Community College built a hovercraft powered by an average electric leaf blower! Watch it in action below.

In Chemistry weight of some elements are measure in the form of Average Atomic Mass. Isotopes are found in different abundances in nature. Certain elements have many isotopes and certain elements have few isotopes. Regardless of the number of the natural isotopes, the weighted average mass takes into consideration not only the mass of each isotope, but what also its natural abundance in terms of percent as found in the nature. So when you have the mass of two isotopes of an element and are gi...

There are a lot of do's and don'ts when it comes to block sanding the primer surfacer on your car. In fact, this can make the difference of creating a show quality paint job and a less that average paint job.

Need help figuring out how to solve algebra problems involving averages? 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 (or just finish your homework or study for that next big test). With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to solve algebr...

Love Microsoft Excel? This clip contains a tip that just might induce you to. With this free video tutorial from ExcelIsFun, the 92nd installment of his "YouTubers Love Excel" or YTLE series of free video MS Excel lessons, you'll learn how the AVERAGE function sees zeroes and uses them in calculating an average but does not see blanks.

When you have to find the average of two or five numbers then you have to add all the numbers and then divide then by two or five respectively. However in the case of the function you have infinite many values over any interval. But it is not possible to add all and then divide by infinity. Therefore you have to calculate in a different way. Imagine that you have to find the average of y=f(x). Then you have to average it from the interval from ‘a’ to ‘b’. The inner area under the curve shall ...

When renovating the bathroom, it's always great to get rid of the old and welcome the new. Whether it's tiles, paint, or even the toilet. If you're looking to replace your old toilet with a new one, it can be hard when it comes to installing the new one. So in this tutorial, you'll be finding out how to install a toilet for you Average Joe's, or Jane's. So good luck, pay attention, and be careful. Enjoy!

In this video, Mr. Maisonet provides a quick and easy method for calculating the area of a trapezoid. In the first step, The lengths of the two bases (the two sides of a trapezoid that are parallel to one another) are averaged. The lengths of the bases are first added together, and the sum is divided by two, yielding the average. The average is then multiplied by the height. The resulting product is the area of the trapezoid. This method for finding the area of a trapezoid is mathematically s...

In this video the author explains how to calculate average acceleration along with some real world examples. Now if we subtract the starting speed of a moving vehicle from its maximum speed and divide it by the time taken to reach the maximum speed from the initial speed you will obtain the average acceleration of the vehicle. The author shows this with a racing video example. If you want compute the average acceleration of a moving object watch this video and use the simple method explained ...

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 677th installment in their series of digital spreadsheet magic tricks, you'll learn how to average the last three scores eneterd for any Player using the functions: AVERAGE, IF, ROW, COUNTIF, MIN, LARGE.

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 682nd installment in their series of digital spreadsheet magic tricks, you'll learn how to to average times values that were exported from a database as text values instead of number values.

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 663rd installment in their series of digital spreadsheet magic tricks, you'll learn how to use the AGGREGATE function to add or average while ignoring #N/A errors in hidden rows.

Love Microsoft Excel? This clip contains a tip that just might induce you to. With this free video tutorial from ExcelIsFun, the 91st installment of his "YouTubers Love Excel" or YTLE series of free video MS Excel lessons, you'll learn how to create an average with multiple criteria using pivot tables (PivotTable). Learn to love digital spreadsheets more perfectly with the tricks outlined in this free Microsoft Office how-to.

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 583rd installment in their series of digital spreadsheet magic tricks, you'll learn how to use the AVERAGEIF & IFERROR functions with absolute and mixed cell references to create a large table of conditional average calculations (averaging with criteria).

New to Microsoft Excel 2010? Looking for a few good tips and tricks? In this free video tutorial from everyone's favorite MS Excel guru, YouTube's ExcelIsFun, the very first installment in his series of Excel 2010 video tutorials, you'll learn how to use use the RANK.AVE function to average rank scores in the event of a tie. See the new Excel 2010 RANK.AVE and RANK.EQ functions.

Love Microsoft Excel? This clip contains a tip that just might induce you to. With this free video tutorial from ExcelIsFun, the 90th installment of his "YouTubers Love Excel" or YTLE series of free video MS Excel lessons, you'll see a complicated average calculation with multiple criteria using the MONTH function on a date field. Learn to love digital spreadsheets more perfectly with the tricks outlined in this free Microsoft Office how-to.

This video shows us how to use the following functions in Excel: average, count, counta, min, max, and sum. First, start off by create a set of numbers to work with. After that, click on an empty cell that you want to use for the functions. To do an average, click on the functions button on the top right corner of the menu bar, you'll see a list of all the functions that are available. Select average, and then highlight all the numbers that you want to find the average of. Repeat the exact sa...

Create a table with sales data with this video.

Tuesday has long been considered the best day to save money on a plane ticket. Airlines typically announce new deals on Monday, so by Tuesday, all other airlines have matched their competitor's lowest fares. It's a tip that I learned at a young age from my father and was solidified by countless others who swore by it. Well, it turns out that we were all wrong.

As you might guess, one of the domains in which Microsoft Excel really excels is finance math. Brush up on the stuff for your next or current job with this how-to. In this tutorial from everyone's favorite digital spreadsheet guru, YouTube's ExcelIsFun, the 12th installment in his "Excel Finance Class" series of free video lessons, you'll learn how to calculate average and marginal tax rates with Excel.

Need a primer on how to discount outliers when calculating a statistical average within Google Spreadsheets? It's easier than you might think. And this free video tutorial presents an easy-to-follow, step-by-step guide of the entire process. For detailed instructions, and to get started lopping off outliers in Spreadsheets yourself, take a look!

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 532nd installment in their series of digital spreadsheet magic tricks, you'll learn how to use the AVERAGE, STDEV, MAX, MIN and SUM function to add statistical data. Specifically, this video lesson discusses how to sum and average evidence in an age discrimination case.

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 145.75th installment in their series of digital spreadsheet magic tricks, you'll learn how to use the AVERAGEIF (AVERAGE IF) function to create a formula that will calculate the average when you have more than 1 criterion.

New to 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 Excel tutorial from ExcelIsFun, the 371st installment in their series of digital spreadsheet magic tricks, you'll learn how to calculate the average time between customer orders by adding a new column to a data set with an IF function formula.

This video shows you how to calculate weighted average cost from a transactional data set using SUMPRODUCT function. It explains things very clearly. If you're working with a very large database transactions the SUMPRODUCT function makes it. It works as text if you do the formatting first and then type the number. We put the number in first and then format as text, then press F2 and ENTER.

Microsoft Office Excel 2007 spreadsheet manager is a powerful tool that enables information workers to format spreadsheets, as well as analyze and share information to make more informed decisions. In this MS Excel video tutorial, you'll learn about using Excel to calculate average values and to pick max and min values. For more on this handy feature of Excel, watch this how-to.

One of the best ways to monitor your diet is by measuring your body fat content. In this three part tutorial, learn how to measure body fat using a caliper. A caliper is a device used to pinch and measure the fat on your body. A caliper is cheap, fast and accurate and makes an excellent alternative to electronic devices. Check out this video and stay on top of your new workout regime - mind the scale and use the caliper to know what's muscle and what's excess.

If you've ever listened to your loved ones sing in the shower or watched a few minutes of American Idol, you would think that the majority of the population is tone deaf. In reality, only about 4 percent of the world's population suffers from tone deafness, or the inability to distinguish between different pitches. Che Guerava, Charles Darwin, and Ulysses S. Grant were all tone deaf.

This is the ultimate guide to drawing correct human proportions. If you've always had trouble with it in high school art class or in art school, this video condenses all the information into a tight package that's fun and easy to understand. This will uncover all the tricks to human proportions for figure drawings.

This fitness how to video discusses a few standing poses that might work for tight hamstrings and hips. Ask any non-yogi office worker to sit down on the floor and cross his legs, and 9 out of 10 times, his knees will be way off the floor and his back will be hunched up like Quasimodo. If your hips are really tight, your average yoga class will only help you make small gains. In order to double or even triple your progress, keep going to class, but take ten minutes each day and practice the p...

Taylor Momsen, who plays Dan Humphrey's rebellious sister, Jenny, on "Gossip Girl," may be in the same cast as some of New York's most attractive mainstream beauties, but she's not just an average pretty face.

iMovie allows the average computer user the ability to quickly make movies out of your digital video footage or home movies. This is not the most professional way to color correct your footage, but it should be sufficient for the average Mac user. Follow along and see how to adjust color using iMovie.

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 nth installment in his "Highline Excel Class" series of free video Excel lessons, you'll learn how to do basic statistical analysis in Excel. Specifically, this video covers 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 41st installment in his "Excel Statistics" series of free video lessons, you'll learn how to calculate deviations, variance and standard deviation for a sample and a population using Excel tables and the VAR, S...

New to Excel? Looking for a tip? How about a tip so mind-blowingly advanced as to qualify as a magic trick? You're in luck. In this Excel tutorial from ExcelIsFun, the 243rd installment in their series of digital spreadsheet magic tricks, you'll learn how to find typical values, or averages – a single value that allows you to talk about all the data points in a given spreadsheet. Specifically, you'll learn how to find the mean, median, mode and standard deviation for a set of numbers.

Just because Developer Options is hidden by default doesn't mean you shouldn't unlock it. While for rooters its benefit are obvious, even for the average user it opens the door for tools which enhance your experience. From animation speed to improving gaming graphics, Developer Options has something for everyone.

The coolest way to do a shot? Drink it from a glass made of ice. Learn how to make a shot glass out of ice.

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 and Mr. Excel, the 43rd installment in their joint series of digital spreadsheet magic tricks, you'll learn how to calculate weighted average cost ending inventory value from transactional records on 2 different sheets using the COUNTIF, SUMIF and SUMPRODUCT functions.

This video is a tutorial on how to identify a mustang horse breed. The instructor begins by saying that it is not easy to identify a mustang horse because of the cross breeding characteristics of mustangs. The mustang shown in the video is larger then an average mustang. The instructor shows the mustangs white brand and all the different meanings along with age tagged along with the horse. The mustang is known for having feet that are larger then most other horse species. The most important s...