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.
Yes it is true, whenever I dye my hair I leave the dye on longer than it says to. Don't leave the dye on to long or else it will dry into your hair. Leave it in your hair for about 45 minutes or less. jamiejeidy Â· 8 years ago.es it is true, whenever I dye my hair I leave the dye on longer than it says to. Don't leave the dye on to long or else it will dry into your hair. Leave it in your hair for about 45 minutes or less. jamiejeidy Â· 8 years ago.