Mean Plus Or Minus Standard Deviation. The sign may also represent an inclusive range of values that a reading might have. The mean and median are 10 29 and 2 respectively for the original data with a standard deviation of 20 22.
Pr μ 2 σ x μ 2 σ φ 2 φ 2 0 9772 1 0 9772 0 9545 displaystyle pr mu 2 sigma leq x leq mu 2 sigma phi 2 phi 2 approx 0 9772 1 0 9772 approx 0 9545. In mathematics it generally indicates a choice of exactly two possible values one of which is obtained through addition and the other through subtraction. The plus minus sign also plus or minus sign is a mathematical symbol with multiple meanings.
Pr μ 2 σ x μ 2 σ φ 2 φ 2 0 9772 1 0 9772 0 9545 displaystyle pr mu 2 sigma leq x leq mu 2 sigma phi 2 phi 2 approx 0 9772 1 0 9772 approx 0 9545.
To compute the probability that an observation is within two standard deviations of the mean small differences due to rounding. Pr μ 2 σ x μ 2 σ φ 2 φ 2 0 9772 1 0 9772 0 9545 displaystyle pr mu 2 sigma leq x leq mu 2 sigma phi 2 phi 2 approx 0 9772 1 0 9772 approx 0 9545. Firstly it is mandatory to understand the difference between and sd standard deviation and se m standard error of the mean. In experimental sciences the sign commonly indicates the confidence interval or error in a measurement often the standard deviation or standard error.
