Mean Plus Minus Standard Deviation. Again we see that the majority of observations are within one standard deviation of. The dotted lines are drawn at the mean plus or minus two standard deviations and about 95 of the values lie within those limits.
Again we see that the majority of observations are within one standard deviation of. In mathematics it generally indicates a choice of exactly two possible values one of which is obtained through addition and the other through subtraction. For the serum triglyceride data s 0 04802 0 22 mmol litre.
Where the mean is bigger than the median the distribution is positively skewed.
For the logged data the mean and median are 1 24 and 1 10 respectively indicating that the logged data have a more symmetrical distribution. Thus to ensure that the final result is within the specification limits the goal is not actually 6 standard deviations but 4 5. 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.
