![]() ![]() ![]() ![]() However, if you do the sample analysis on a separate random sample of 10,000 other patients, you may get an average age of 62.3 years. If you do this on a random sample of 5,000 patients, you may get an average age of diagnosis of 61.5 years. For example, 10,000 British people with the disease may be analysed and will be used to generate the average age of diagnosis. It is not feasible to determine this for everyone in the UK, therefore researchers take a sample population to generalise an overall figure. Say you are interested in the average age people in the UK are diagnosed with Alzheimer’s disease. The standard error (SE), sometimes referred to as the standard error of the mean (SEM), is a statistic that corresponds to the standard deviation of a sampling distribution, relative to the mean value. In this guide I will explain what the standard error formula is and how to use it to work out the standard error through the use of an example. ![]()
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