For any set of data values, the mean is a measure of central value. Depending on the type of data, the mean tells you the central value of that data. To find the mean, you must first collect your data, either through an experiment of some sort or just from an assigned problem. For this example, use the assigned data set of 6, 7, 10, 12, 13, 4, 8 and 12. This set is small enough to count by hand to find that there are eight numbers in the set. In statistical work, the variable N{\displaystyle N} or n{\displaystyle n} is commonly used to represent the number of data values. The first step of finding the mean is calculating the sum of all the data points. In statistical notation, each value is generally represented by the variable x{\displaystyle x}. The sum of all values is symbolized as x{\displaystyle \Sigma x}. The capital Greek letter sigma signifies finding the sum of the values. For this sample data set, the calculation is: x=6+7+10+12+13+4+8+12=72{\displaystyle \Sigma x=6+7+10+12+13+4+8+12=72} Finally, divide the sum by the number of values. The Greek letter mu, {\displaystyle \mu }, is commonly used to represent the mean. Therefore, the calculation of the mean is: =xN=728=9{\displaystyle \mu ={
rac {\Sigma x}{N}}={
rac {72}{8}}=9}

Summary: Collect and count your data. Find the sum of the data values. Divide to find the mean.

Any person can get Achilles tendinitis, but doctors know that certain factors can increase your risk of having problems with this condition. Being aware of your risk can help you recognize and treat it effectively. Middle-aged people are most likely to suffer from Achilles tendinitis. Physical factors such as flat arches, obesity, and tight calf muscles can put more strain on your Achilles tendon and cause tendinitis. Running in worn out shoes can also increase your risk. Environmental factors such as cold weather or running on hilly terrain can increase your risk. Medical conditions including diabetes and high-blood pressure make your risk of developing Achilles tendinitis higher. Taking medications such as the antibiotic fluoroquinolone may increase your risk. Achilles tendinitis has many different symptoms that can range from mild to severe. Identifying potential symptoms that you have can help you get effective treatment as soon as possible. You may experience pain and stiffness along your Achilles tendon in the morning. You may experience pain along the Achilles tendon or back of your heel that becomes more severe with activity. You may experience severe pain along your tendon or heel the day following exercise or strenuous activity. You may experience persistent swelling that increases throughout the day and with activity. You may notice that your Achilles tendon thickens. You may notice a bone spur, which is a bony projection that comes off of your heel. Swelling and other irregular growths can indicate Achilles tendinitis. Gently feeling your heel area with your hand can help identify any irregularities. Gently touch along your Achilles tendon and heel to feel for any swelling or thickening of the tendon. Use your fingers to feel for any bony spurs at the lower part of the tendon, which is located at the back of your heel. If you notice any of these symptoms, you may want to consult your doctor. Pay attention to your body for any pain that is present along your Achilles tendon or in the heel area or if you are experiencing problems moving this region. These symptoms can indicate Achilles tendinitis and should be treated to prevent further pain. You can have pain that is mild to severe. Some points may be more tender than others depending on the exact location of the tendinitis. You may have a limited range of motion in your ankle area, including a decreased ability to flex your foot.

Summary: Be aware of your risk for Achilles tendinitis. Identify potential symptoms. Feel for swelling or other irregularities on your Achilles tendon. Observe pain and mobility problems.

Use an HDMI cable to connect the TV to the computer. In essence, you'll now be using the TV as a monitor. The steps to do this vary by TV. It's white, pink, blue, and purple music note icon on the Dock on a Mac. If you're using Windows, you'll find iTunes in the All Apps area of the Start menu. It's near the top-left corner of iTunes. Details about this movie will appear. A play button will appear. The movie will now display on your television.

Summary: Connect the TV to your computer. Change to the HDMI channel on your TV. Open iTunes. Select Movies from the drop-down menu. Click the movie you want to watch. Hover the mouse over the cover image. Click the play button.

Rotary veneers are what plywood is made out of and generally produce an appearance that many people don't like. However, they can also come in larger sheets and may be the only option for very large projects. Sliced veneer looks like normal lumber, and allows you to get really beautiful grain detail. You can get random sets of veneers, or you can get book-matched sets. In book matched sets, you get the pieces that were cut one next to the other, so that the grain patterns match up. This can be used to create beautiful designs. However, unmatched sets may look more "natural". You can get veneer sheets that have adhesive already applied to one side. These are the easiest to place. If you get regular veneer, however, you'll need to use the application method discussed in the other section. These are generally applied just like a sticker, but you should read the included instructions to see if that particular manufacturer requires special steps. Veneers are attached to a substrate (or base material). Usually this is either another wood (if you are veneering, for example, panels on doors or cabinets) or it is a cheaper material altogether, such as MDF. These man-made materials are probably the best option, since they usually allow you to save the most money. You can use yellow or carpenter's glue if you want to. If you live in a very dry environment with little humidity, these will work perfectly fine. If you live in a humid environment, however, these glues can cause your veneers to wander. It's better to use a proper veneering glue. Many other methods of veneering use these glues. Be wary of those methods, especially if you live in a humid environment.
Summary: Choose a rotary vs sliced veneer. Choose a random or book-matched veneer. Choose your application method. Choose your substrate. Choose a glue.