![]() ![]() With probability sampling, where elements of a sample are randomly selected, you can collect data that is likely to be representative of the population. However, even with probability samples, some sampling error will remain. Standard error matters because it helps you estimate how well your sample data represents the whole population. In statistics, data from samples is used to understand larger populations. Frequently asked questions about standard error.How should you report the standard error?.While Minitab has the default confidence interval at 95%, you can see that other confidence levels can be selected as well. Model summary: Here the example shows what selections to make in Minitab to get the confidence intervals around the mean and standard deviation. The following example shows how to generate 90% confidence interval of the mean. ![]() In order to see the confidence interval of “Cycle Time (Minutes)” at other confidence level, we need to enter the confidence level of our interest in the window “Graphical Summary” and click “OK.” The 95% confidence interval of the mean is shown in the newly-generated “Summary for Cycle Time (Minutes).” The confidence level is 95% by default.
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