Normal Distribution and z-scores. mean: the average obtained by dividing the sum of the data by the number of data in the set. Given a set of data, {x 1, x 2, x 3, ..., x n }, you can find the mean, , using the following formula: standard deviation: the extent to which data differs from the mean.
Quick Answer. Kool-Aid hair dye hair dye can last for eight to 12 weeks. The intensity of the color depends on several factors such as the natural hair color, the amount of time the hair is soaked with the dye, the amount of dye used and the dyeing method used. Continue Reading.
Tantowel products are triple-heat sealed and vacuum packed. They have been tested out to two years but as long as the individual packettes remain intact (no rips, tears, punctures, etc.) they should last indefinitely.How long does a Tantowel tan last? A Tantowel tan generally last 4-7 days.Tantowel works with the proteins in your skin to create a change in color in the surface layer. It is actually your skin that is tan, not just a color on top of it. As your skin naturally sheds so does your tan, fading much like a tan from the sun.Since every body is different, with varying ranges of pH balances and varying skin conditions, every tan will be slightly different (including how long it lasts) though the general process is the same.antowel products are triple-heat sealed and vacuum packed. They have been tested out to two years but as long as the individual packettes remain intact (no rips, tears, punctures, etc.) they should last indefinitely.