We are receiving a lot of questions about relevant analyses in the Analyse-it Method Validation edition to help in evaluating new diagnostic tests in the fight against COVID-19. Below are some quick links that will help, but contact us if you have questions - we are working as normal.
Also see our latest blog post: Sensitivity/Specificity and The Importance of Predictive Values for a COVID-19 test
A mean plot shows the mean and standard deviation of the data.
A line or dot represents the mean. A standard error or confidence interval measures uncertainty in the mean and is represented as either an error bar or diamond.
An optional error bar or band represents the standard deviation. The standard deviation gives the impression that the data is from a normal distribution centered at the mean value, with most of the data within two standard deviations of the mean. Therefore, the data should be approximately normally distributed. If the distribution is skewed, the plot is likely to mislead.