How do you calculate CD in statistics?
The CD can be expressed as a percent (CD%) or an absolute value in the measurement units of the analyte (CDu). These are related by CDu = CD% × A units, where A is the analyte concentration from which the CD will be determined.
Can standard deviation be bigger than mean?
The answer is yes. (1) Both the population or sample MEAN can be negative or non-negative while the SD must be a non-negative real number. A smaller standard deviation indicates that more of the data is clustered about the mean while A larger one indicates the data are more spread out.
What number is considered a high standard deviation?
For an approximate answer, please estimate your coefficient of variation (CV=standard deviation / mean). As a rule of thumb, a CV >= 1 indicates a relatively high variation, while a CV considered low.
Is high standard deviation good or bad?
Basically, a small standard deviation means that the values in a statistical data set are close to the mean of the data set, on average, and a large standard deviation means that the values in the data set are farther away from the mean, on average.