Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. There are other ways of solving a quadratic equation instead of using the quadratic formula such as factoring direct factoring grouping AC method completing the square graphing and others. F i frequency of ith class.
The arithmetic and quadratic means are the special cases p 1 and p 2 of the p th-power mean Mp defined by the formula where p may be any real number except zero.
The symbol for Standard Deviation is s the Greek letter sigma. We denote Mean by. U i x i ah. The case p 1 is also called the harmonic mean.