Applications of bootstrap methods to real-life engineering problems have been reported in many areas, including radar and sonar signal processing, geophysics, biomedical engineering and imaging, pattern recognition and computer vision, image processing and environmental techniques to signal processing practitioners with the hope that they will solve problems which may be intractable with classical tools. Bootstrap method is a statistical method that is used to calculate standard errors (needed for calculation of confidence interval) of statistic value which obtain from random sample (statistic value might be mean, median, proportion, odds ratio, correlation coefficient or regression coefficient depend on objective). Furthermore bootstrap method can be done by using computer to random samples with replacement (the sample will be replace to the group after been taken out). This method is different from jackknife procedure which is method that detects the outliers data and detection of variable from cross validation, where this method commonly use for detecting the accuracy of the equipment. Bootstrap can also be conducted by sampling without replacement such as regression time series, mean and other statistical problems