The standard deviation is always positive and has the same units as the values under consideration.

the standard deviation of individual P values about their mean should be reported,

Standard deviation:

In fifteen Wistar albino rats, weighting 328+-19 g (mean +-sd)

In general, the standard deviation is defined as ([6] to [8]):

The standard deviation of the mean sm(Y)is defined as ([6] to [8]):(4).

To examine the aptness of the regression model for the data at hand, the following statistical parameters need to be determined:- Standard Deviation:

Calculate the cut-off value by adding 0,6 to the value of the negative control (0,6 is the standard deviation derived with a group of 30 negative sera).

Some matrix algebra using the rules of variances establishes that the standard deviations of the estimators ak are given by the following relation [8]:(5).[s(a)] denotes the column vector of the standard deviations of the estimators with " m+1 " elements, and [X] is the matrix of the explanatory variable with " n " rows and " m+1 " columns.

- the standard deviation of individual P values about their mean should be reported,

These models are expressed by the following general relation:(12).The estimators ak, the coefficient of determination R2, the standard deviation s(J) and the mean of the relative error em of these models are listed in Table 1.As an example, we took 12:00 on 21 December (t1= 1213, t2= 12) to compare the recorded value and the computed value.

In each analysis the following computations were performed:- the estimators ak;- the standard deviation s (Y);- the mean standard deviation sm (Y);- the standard deviation of the estimators s (ak); - the t-test t*;- the coefficient of multiple determination R2; - the mean relative error em.Since we deal with large sets of data, a value of 0.75 or more for R2 is desirable [11].

f) the mass median aerodynamic diameter (MMAD) and the geometric standard deviation (GSD);

The mean (+SD) age at the start of treatment was 10.4+2.2 years, the mean bone age was 7.1+2.3 years, and the mean height was 3.1+1.2 SD below normal.

- the means and standard deviations from at least five samples from the saturation plateau of each run,

SD – Standard Deviation.

The mean value from at least five consecutive samples taken from the saturation plateau should be calculated for each run, as should the standard deviation.

These should be tabulated and presented with mean values and a measure of variability (e.g. standard deviation) and shall, if possible, include:

- individual plate count, the mean number of revertant colonies per plate, standard deviation, dose/effect relationship when possible;

Individual plate counts, the mean number of revertant colonies per plate and standard deviation should be presented for the tested chemical and the controls.

The repeatability of the analyser expressed as one standard deviation must be better than 1 % of full scale deflection at zero and at 80 % ± 20 % of full scale on all ranges used.

The repeatability of the analyser expressed as one standard deviation must be better than 1 % of full scale deflection at zero and at 80 % ± 20 % of full scale on all ranges used.

- the geometric standard deviation (GSD) is the ratio of the estimated 84 percentile to the 50 percentile and indicates the slope of the cumulative particle size distribution curve, assuming the size distribution to be log normal.

If the deviation is greater than 10 % the analysis must be repeated in comparison with another standard solution until the deviation is within 10 %.

(f) The mass median aerodynamic diameter (MMAD) and the geometric standard deviation (GSD);

Mean numbers and standard deviations for each experimental and control group are also listed.

the mean recovery rates should be between 70 % and 110 % with a relative standard deviation of < 20 %;

Individual plate counts, the mean number of revertant colonies per plate and standard deviations should be presented for the tested chemical and the controls.

The repeatability (Relative Standard Deviation:

EC50 (+ UVA) and EC50 (- UVA) and PIF, mean and standard deviation.

historical data of negative control, mean and standard deviation.

The mean Cmax (± standard deviation) was 185±55 microgram per ml.

the mass median aerodynamic diameter (MMAD) and the geometric standard deviation (GSD);

- Growth disturbance (current height standard deviation score (SDS) < -2.5 and parental adjusted

the means and standard deviations from at least five samples from the saturation plateau of each run,

total of 5 doses, average peak serum concentrations (mean ± standard deviation) rose between the first dose (21 ± 14 µg/ ml) and fifth doses (32 ± 22 µg/ ml).

AUC0 - ∞ = Area Under the Curve MRT = Mean Residence Time SD = Standard Deviation CI = Confidence Interval

The relative standard deviation of a comparable TCM-method for replication has been found to be 17 ¶g/m3 at a concentration of 1 000 ¶g/m3 (1).

Peak serum concentrations (peak + SD) rose between the first dose (16 + 12 µg/ ml) and the fifth dose (21 + 14 µg/ ml).

The limit of detection is calculated as the apparent content corresponding to the value of the mean plus three times the standard deviation for the blank determinations.

individual plate count, the mean number of revertant colonies per plate, standard deviation, dose/effect relationship when possible;

Responders were defined as those who experienced a ≥ 30 % drop in VASPI score compared to baseline. SD – Standard Deviation.

The mean (standard deviation, SD) dissociation constant (Kd) of binding was 5.1 (3.0) ng/ ml, denoting the concentration at which 50 % of binding sites in blood cells were occupied.

Peak plasma concentration (Cmax) observed in 17 subjects following a single intravenous dose of 1500 mg infused over 15 minutes was 51 ± 19 µg/ mL (arithmetic average ± standard deviation).

The relative standard deviations (RSD) should be calculated.

the geometric standard deviation (GSD) is the ratio of the estimated 84 percentile to the 50 percentile and indicates the slope of the cumulative particle size distribution curve, assuming the size distribution to be log normal.

AUCt = area under the plasma concentration-time curve from zero to the last measurable concentration; t½ = half-life; CL = clearance; MRT = mean residence time; K-value = incremental recovery; SD = standard deviation

In 35 patients receiving efavirenz 600 mg once daily, steady-state peak concentration (Cmax) was 12.9 ± 3.7 µM (29 %) [ mean ± standard deviation (S. D.) (coefficient of variation (%CV)) ], steady-state Cmin was 5.6 ± 3.2 µM (57 %), and AUC was 184 ± 73 µM• h (40 %).

The mass median aerodynamic diameter (MMAD) and the geometric standard deviation (GSD);

Responders were defined as those patients who 1) experienced a ≥ 30 % drop in VASPI score compared to baseline; 2) had stable or decreased concomitant opioid analgesics; and 3) had opiate type unchanged from preinfusion if receiving opiates. b 164 patients provided VASPI scores for ziconotide at the end of titration. SD – Standard Deviation.