Q: Preheat the oven to a temperature of 375F (191C).
A: Preheat the oven.

Q: Take your mean, and use the empirical rule to find the distributions of data 1, 2, and 3 standard deviations from the mean. Write these on your curve for reference. For example, imagine you are analyzing the weights of a population of cats, where the mean weight is 4 kilograms, with a standard deviation of 0.5 kilograms: 1 standard deviation above the mean would equal 4.5 kg, and 1 standard deviation below equals 3.5 kg. 2 standard deviations above the mean would equal 5 kg, and 2 standard deviations below would equal 3 kg. 3 standard deviations above the mean would equal kg, and 3 standard deviations below would equal 2.5 kg. Once you have your curve set up, you can use the Empirical Rule and simple arithmetic to solve data analysis questions. Start by reading your question carefully to figure out the sections you need to work with. For example: Imagine you are asked to find the upper and lower weights for 68% of a population of cats. You would need to look at the two centermost sections, where 68% of data will fall. Similarly, imagine the mean weight is 4 kilograms, with a standard deviation of 0.5 kilograms. If you are asked to find the proportion of cats above 5 kilograms, you need to look at the rightmost section (2 standard deviations away from the mean). If you're asked to find the percentage of the population between a certain range, all you have to do is add up the percentages within a given set of standard deviations. For instance, if you are asked to find the percentage of cats who weigh between 3.5 and 5 kilograms, if the mean weight is 4 kilograms, with a standard deviation of 0.5 kilograms: 2 standard deviations above the mean will be 5 kilograms, and 1 standard deviation below the mean will be 3.5 kilograms. This means that 81.5% (68% + 13.5%) of the cats weigh between 3.5 and 5 kilograms. Take the information provided by the percentage distributions and standard deviations to find upper and lower limits for portions of your data. For instance, a question about your cat weight data may ask: "What is the upper weight limit of the lowest 2.5% of cats?" The lowest 2.5% of data would fall below 2 standard deviations from the mean. If the mean is 4 kilograms, and standard deviation is 0.5, then the lowest 2.5% of cats will weight 3 kilograms or less (4 - 0.5 x 2).
A: Find the distributions of your data. Determine the section of the curve your question asks you to analyze. Find the percentage of your data within a certain range. Use the section percentages to find data points and ranges.

Q: Since you'll be dealing with gasoline and various car parts, it's important to protect yourself from potential harm. Before you begin to lift your car and locate the oxygen sensor, put on a sturdy pair of work gloves to protect your hands. You should also wear a pair of protective eyeglasses or goggles in case any WD-40 or gasoline comes near your eyes. Both work gloves and protective eyewear can be purchased at your local hardware store, or at a large retail store such as a WalMart. In order to remove the oxygen sensor, you'll need to have access to the underside of your vehicle. Make sure that the vehicle is on level ground, is in "Park," and that the emergency break is engaged before lifting the car. Place the jack under part of your vehicle's chassis (including an axis or the side of the car frame) and lift the vehicle. You can purchase a car jack at any auto-parts store. Speak with the sales staff and let them know the type and size of vehicle you have, so they can recommend an appropriate jack. Depending on the make and model of your vehicle, it may have more than one oxygen sensor. Check your vehicle's owner's manual for the exact locations of the sensors. All vehicles have at least two oxygen sensors: one in front of your car's catalytic converter, and one in the car's exhaust manifold. If your vehicle has more than one exhaust manifold, there will likely be an oxygen sensor inside each one. The oxygen sensor will look something like a spark plug: roughly 2 inches (5 cm) long. One end will have a hexagon shapefor a wrench to fit overand the other end will be threaded to screw into your vehicle.
A: Protect your hands and eyes. Elevate the vehicle with a car jack. Identify the oxygen sensor(s).

Q: When gallbladder digestive fluid hardens into deposits, it can create gallstones. These deposits can range in size from the size of a grain of sand to a large golf ball. You will notice a yellowish tint to the skin or the whites of your eyes and white or chalky stools. Jaundice usually occurs when gallstones block the bile duct, causing a backup of bile into the liver. The bile may begin leaking into your bloodstream. Cholecystitis is an inflammation of the gallbladder. It can be caused by gallstones, tumors, or other gallbladder problems. These attacks often result in severe pain that can generally occur along the right side of the body or between the shoulder blades. This pain is often accompanied by nausea and other stomach discomfort. A buildup of too much bile in the gallbladder can cause gallbladder attacks. Different people experience gallbladder attacks differently. Although pain typically is on the right side, or between the shoulder blades, it may also feel like low back pain, cramps, or the like. Large or fatty meals can trigger a gallbladder attack. The attacks often occur in the evening, within hours of eating. Gallbladder attacks are usually a symptom indicating that something else is wrong with the gallbladder. If gallbladder function is compromised and the gallbladder doesn't empty as quickly as it should, a gallbladder attack may occur.
A:
Learn about gallstones. Watch for signs of jaundice. Identify symptoms of Cholecystitis. Know that diet affects your gallbladder.