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.
Ok, I mixed Kool Aid (grape/purple) with conditioner and put it in my hair and it stayed in for two and a half months. I left the Kool Aid in for like, 12 hours, but it was totally worth it cause I got an amazing color (light purple). I have black hair, so I had to bleach it first (and I did wash it with shampoo after i dyed it). Also take note that I have what some people may consider long hair (down to the bottom of my ears).