The normal distribution formula is based ... the Normal Distribution Table. Properties of a normal distribution include: the normal curve is symmetrical about the mean; the mean is at the middle ...

Investopedia / Alex Dos Diaz In statistics, variance measures variability from the average or mean. It is calculated ... calculated by using the following formula: You can also use the formula ...

Using the frequency table, the number of children is the total of all the frequencies. Image caption, To find the mean age, use a calculator to divide the total age of all the children (168 ...