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Use a hammer and chisel to break off the damaged stucco and lath from the sheathing of the wall, but you must leave some lath around the damaged area, as the new lath will be tied to the old. The stucco should fall off fairly easily. If you wet down the wall, it will reduce the dust that comes off at this step. from the non-damaged stucco in the outside of the patch area. This is the lath previously described as important that should not be removed. Pulling it back will allow you to work it a little more comfortably. Cut it as big as the uncovered portion of the lath. Use the hammer tacker to stick the piece on the sheathing.  It is best to have the new piece go behind the old tar paper at the top (so if any moisture gets inside the wall, it will run out and away from the wood) and to have the new tar paper in front of the old tar paper at the bottom (so that is any moisture gets in the wall, it will run outside, away from the wood). Use as few staples as possible because holes in the tar paper can let water in. Use the rubber membrane to seal of the outside edge of the lath. The rubber membrane may not stick well to the area being sealed off. In that case, tack a few staples in or improvise in order to keep it in place. Instead of rubber membrane, which is quite expensive, you can use a tube of Polyurethane sealer, which costs less and was used by builders for this purpose prior to the invention of rubber membrane. Cut the piece size to fit into the patch area. The metal lath should be large enough to fit beyond where the metal lath from the good stucco on the outside edge can fit over the cut piece. Place the lath in the patch and place a few nails in that will keep it in place. Place nails in places that will provide a good anchor to the lath. Don't worry about hitting studs because it is only a patch. The nails should be spaced about 6 inches (15.2 cm) apart. Take the old lath that you bent outwards and bend it over the new piece of lath you installed. Place nails where the two pieces overlap.

summary: Chop the Stucco. Pull back the old metal lath. Cut a piece of the double D tar paper. Seal the outside edge of the metal lath. Cut a piece of metal lath. Seat the lath. Nail in the lath. Overlap the lath.


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Goggles are provided in tanning beds for a reason. You need to protect your eyes from the rays you're exposing your body to, and the goggles will provide that protection. They should fit snugly over your eyes. Make sure you use goggles specifically designed for tanning beds or lamps. With tanning, it's best to do a short session, particularly the first time. If you go too long, you can burn. Also, shorter sessions are better in the long run. They can help you build up a tan, but they won't leave you burned. Remember, no amount of tanning is safe. Starting slowly may reduce your chances of burning. However, you'll still have the damaging effects of the tan. That is, skin is classified in six general categories, according to how fair or dark a person is. Recommendations for how long you should tan are based on your skin type. However, no matter what type of skin you have, tanning still causes damage to your skin.  If you have type one or two skin, you shouldn't use tanning beds at all. Type one is someone who always burns, has blue or green eyes, and has light hair. Type two is someone who burns most of the time, has blue or brown eyes, and has light hair. The other four skin types range from people who sometimes burn with brown hair and brown eyes to people with very dark skin. The tanning saloon should be able to tell you how long you should tan for your skin type. If you've built up a tan, then you should reduce your sessions to a single session a week. You'll still maintain your tan, but you're keeping your exposure as low as possible, though any exposure puts you at risk for skin cancer. When you're under 18, you're much more susceptible to burning than older adults. Therefore, kids and teenagers should never use tanning beds to gain a tan.

summary: Cover your eyes with goggles. Begin slowly. Limit your tanning time according to your skin type. Maintain a tan by going only once a week. Skip tanning completely if you're under 18.


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Mean and median are 2 of the most basic statistical concepts, and they're foundational to other, more complicated concepts. The mean is the average of a set of numbers, and the median is the middle of a set of numbers. Your text book should cover these concepts – and how to calculate them – at the very beginning. You can also find instructions at on websites like MathWorld.  To calculate the mean, add all of the numbers in your data set and divide the sum by the number of numbers in the set. For example, if your data set includes the numbers 2, 4, 6, 8, 10, and 12, the sum of the set is 42. 42 divided by 6 (the number of data points) is 7. 7 is your mean. The median is the just the middle of any set of numbers. So the median of the data set 2, 4, 6, 8, and 10 is 6. If you have an even number of data points, add the 2 middle numbers of divide by 2. Once you know how to calculate mean, you can move on to more complicated concepts. Variance is the average of squared differences from the mean. Knowing the variance can help you understand how spread out a set of data is.  For example, let's say you and your 3 friends each have a dog, and their heights are 12 in (30 cm), 20 in (51 cm), 16 in (41 cm), and 32 in (81 cm). First, take the mean of their heights by adding all 4 heights together and dividing by 4. In inches, this would be 12 + 20 + 16 + 32, which equals 80. Divide that by 4 (the total number of dogs) to get 20. So the mean of their heights is 20 in (51 cm). Then calculate the variance by subtracting each individual height from the mean and squaring it. So 20 - 12 is 8, and 8 squared is 64. 20 - 20 is 0, and 0 squared is still 0. 20 - 16 is 4, and 4 squared is 16. And 20 minus 32 is -12, and -12 squared is 144. 8 + 0 + 16 + 144 = 168. To get the final variance, divide the sum of the squared differences from the mean (168) by the number of dogs (4). So the variance of this data set is 42. Standard deviation tells you how much each data point differs from the mean. To calculate the standard deviation, you'll need the variance first. Then take the square root of the variance. If the resulting number includes a decimal (most will), round it to the nearest whole number. For example, if the variance of your and your friends' dogs' heights is 42, the standard deviation is the square root of 6.48. You'd round that down to 6. That tells you that, on average, each dog is about 6 in (15 cm) away from the mean of the dogs' heights. The normal distribution is a graphic distribution of a set of data's mean and the variations from the mean. You can learn a lot about a data set from normal distribution graphs. To learn how to calculate them, you'll need to calculate z values – individual points on the graph. A table of z-values can usually be found in your text book. Your textbook should have detailed instructions on how to calculate points on a normal distribution graph. You can also find resources online, at websites like minitab or MathWorld.
summary: Start with mean and median. Learn the connection between variance and mean. Understand the connection between variance and standard deviation. Learn to calculate normal distribution.