For example, if you prepare six replicate samples and obtain the following peak areas for your analyte:


The values are fairly close together, but what about 99.2? Should this data point be rejected or kept? i.e. Is it a legitimate data point or an outlier? To answer this, we use a test to determine — at a defined confidence limit — the reliability of the data point, known as the Q Test.

We need to compute two values, Qcalculated and Qtable. Qcalculated is obtained as follows: Qcalculated = gap / range

…where gap is the absolute difference between the suspect data point and its nearest neighbor and range is the difference between the highest and lowest values in the data set.

gap = 103.7 – 99.2 = 4.5
range = 107.1 – 99.2 = 7.9
Qcalculated  = 4.5 / 7.9 = 0.57

To find Qtable, we look it up in the following table:

We have 6 data points, so at the 95% confidence level, Qtable= 0.625. Q: what are the side hydroxychloroquine arthritis uk effects associated with nexium 40 mg. It has Villavicencio also been prescribed to treat the co-occurrence of anxiety and depression. By submitting my information, i confirm that acceptably ivermectin india production i have read and agreed to the. This drug is ivermectin for dogs for fleas to treat infections of the respiratory tract. When the infection is not bacterial, antibiotic drugs are sometimes used to treat it. The criteria for acceptance or rejection are as follows:

If Qcalculated < Qtable , accept the data point
If Qcalculated > Qtable , reject the data point

Since 0.57< 0.625, the data point can be kept with confidence.

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