If your kitten has not already been spayed or neutered, this may be contributing to hyperactivity. Most veterinarians consider this procedure safe for kittens as young as six to eight weeks old, as long as the animal weighs at least two pounds (0.9 kg). The procedure should prevent the following types of behavior (at day or night): Female cats can go into heat when as young as four months old. They tend to make loud, unusual noises, rub against people and objects, and try to get outside. Un-neutered males are generally more active and noisier than neutered ones. They may also spray furniture or act aggressive. Cats can suffer from medical issues that disturb sleep, just like humans. If your kitten shows any of these symptoms, have a vet conduct a full examination: Meowing for much of the night sometimes means the cat is in pain. Active behavior for most of the day and night points to insomnia or another disorder. It's common for kittens to sleep 20 hours a day. Sudden hyperactivity in a previously calm cat can be a sign of a thyroid disorder, although this is rare in young cats. A vet can detect this with a blood test and prescribe daily medication. These products are designed to mimic a cat's facial pheromones, the substances cats rub onto objects with their face to mark them as familiar. Unfortunately, there are few high quality studies of the synthetic version. You can try it to see whether your kitten calms down, but there's no guarantee it will work. Homeopathic calming treatments, including "flower remedies," are not based on science.
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One-sentence summary -- Get your kitten spayed or neutered. Watch for signs of medical problems. Look into synthetic pheromones.

This represents the spread of the population. Standard deviation = = sq rt [(((X-)^2))/(N)]. For the example given, the standard deviation is sqrt[((12-62)^2 + (55-62)^2 + (74-62)^2 + (79-62)^2 + (90-62)^2)/(5)] = 27.4. (Note that if this was the sample standard deviation, you would divide by n-1, the sample size minus 1.)
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One-sentence summary -- Calculate the standard deviation.

After letting the lettuce mature for six weeks, start setting the tray of lettuce outside in a sheltered location for three hours a day. Each day, leave the tray of lettuce outside for two hours longer than the day before. The lettuce plants will be acclimated once they've been left outside for a full day. The entire acclimation process should take around a week. Don't leave the lettuce out at night until they have completely acclimated to the outdoors. This will typically be at the end of the process. It's OK if the weather hasn't completely warmed at this point. Properly acclimating the lettuce will help it develop a resistance to cooler temperatures. You should not plant the lettuce outside, however, until you are certain that there will not be another frost. Organize the holes in staggered rows, making the holes 10 inches (25.4 cm) apart. Don't make the patch any wider than 20 inches (50.8 cm). Plant the lettuce in a part of your garden with rich, well-drained soil that has full sun exposure. 5-10-10 fertilizer contains 5 percent nitrogen, 10 percent phosphorous, and 10 percent potassium. If you don't have fertilizer, use a handful of compost or dried manure instead. Don't try to transfer them when they're dry or the soil will crumble and fall off around their roots. This will make the plants lighter so their growing roots can support them in the ground more easily. Leave the sprouts at the center of the plants intact; they will go on to form the lettuce heads. Plant them so they're at the same depth as when they were in the tray. Fill in the holes with soil and gently pack down the soil around the base of the plants with your hands. Continue to water them daily for the first three days after you transplant them.
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One-sentence summary -- Slowly acclimate the lettuce to being outside. Dig 5 inch (12.7 cm) holes in a patch of your garden for each seedling. Add a tablespoon of 5-10-10 fertilizer to each hole. Water the seed tray before you transfer the lettuce seedlings. Pull the outer leaves off the lettuce seedlings before you transfer them. Plant the seedlings in the holes. Lightly water the lettuce seedlings.

Using your dominate hand, stick the inch of a pairing knife near the strawberry's stem at a 45 degree angle. Carve the knife around the stem in one direction and then repeat in the other direction. The core of the strawberry should come out on its own, leaving a small hollowed out area in the strawberry you will later fill with jello. Set the strawberries on a plate or tray with the cut side down. Place the plate or try aside while you prepare the chocolate. This allows any excess juice to drain from the chocolate. Measure your chocolate discs into a microwave-safe bowl. Place the bowl in the microwave and heat it on medium heat for one minute. Then, remove the bowl from the microwave and stir. Heat the bowl for an additional 15 seconds and then stir again. Continue heating your chocolate for 15 second intervals until it's all fully melted. Once your chocolate is melted, your strawberries should be drained. One by one, hand dip them in the chocolate-mixture tip first. Coat the strawberries completely in chocolate. Set the strawberries, cut-side down, on a baking tray covered in parchment paper after dipping them. Place a chocolate disc on the tip of each strawberry. The melted chocolate should hold the disc in place. When done, the discs help the strawberry shots stand upright. Freezing the strawberries helps the chocolate harden. While the strawberries are freezing, you can prepare your jello. The chocolate should be hardened by the time you're done with the jello.
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One-sentence summary --
Hull your strawberries. Drain the juice. Melt one cup (240 mL) of the chocolate discs. Dip the strawberries in the chocolate. Balance a disc on the tip of the strawberries. Place the strawberries in the freezer.