The disclosed embodiments provide a system for processing data. During operation, the system obtains a current window of one or more intervals of time-series data collected from a monitored system. Next, the system continuously performs a statistical hypothesis test that compares the one or more intervals of the time-series data with baseline values from historic time-series data associated with the monitored system. When the statistical hypothesis test indicates a deviation of the time-series data from the baseline values, the system outputs an alert of an anomaly represented by the deviation.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. A method, comprising: obtaining a current window of one or more intervals of time-series data collected from a monitored system; repeatedly performing, by a computer system, a statistical hypothesis test that compares the one or more intervals of the time-series data with baseline values from historic time-series data associated with the monitored system; and when the statistical hypothesis test indicates a deviation of the time-series data from the baseline values, outputting an alert of an anomaly represented by the deviation. 2. The method of claim 1, further comprising: generating the baseline values from the historic time-series data based on a seasonality of the time-series data. 3. The method of claim 2, wherein generating the baseline values from the historic time-series data based on the seasonality of the time-series data comprises: obtaining one or more previous windows of the historic time-series data from one or more seasonal periods prior to a current seasonal period that contains the current window; and aggregating the historic time-series data from the one or more previous windows into one or more additional intervals that correspond to the one or more intervals of the time-series data within the current seasonal period and the current window. 4. The method of claim 1, further comprising: transforming the baseline values to generate one or more severity levels associated with the anomaly after the deviation is found; and repeating the statistical hypothesis test with the transformed baseline values to identify a severity of the anomaly. 5. The method of claim 4, further comprising: including the severity of the anomaly in the outputted alert. 6. The method of claim 1, wherein obtaining the one or more intervals of the time-series data collected during the execution of the monitored system comprises: aggregating the time-series data within the one or more intervals. 7. The method of claim 6, wherein the aggregated time-series data comprises at least one of: a median; a mean; a quantile; a variance; and a count. 8. The method of claim 1, wherein the statistical hypothesis test comprises a sign test. 9. The method of claim 1, wherein the time-series data comprises a page loading time. 10. The method of claim 9, wherein outputting the alert of the anomaly represented by the deviation comprises at least one of: transmitting the alert to a page owner of a web page associated with the page loading time; and transmitting the alert to an infrastructure owner associated with a location of the anomaly. 11. An apparatus, comprising: one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the apparatus to: obtain a current window of one or more intervals of time-series data collected from a monitored system; perform a statistical hypothesis test that compares the one or more intervals of the time-series data with baseline values from historic time-series data associated with the monitored system; and when the statistical hypothesis test indicates a deviation of the time-series data from the baseline values, output an alert of an anomaly represented by the deviation. 12. The apparatus of claim 11, wherein the memory further stores instructions that, when executed by the one or more processors, cause the apparatus to: generate the baseline values from the historic time-series data based on a seasonality of the time-series data. 13. The apparatus of claim 12, wherein generating the baseline values from the historic time-series data based on the seasonality of the time-series data comprises: obtaining one or more previous windows of the historic time-series data from one or more seasonal periods prior to a current seasonal period that contains the current window; and aggregating the historic time-series data from the one or more previous windows into one or more additional intervals that correspond to the one or more intervals of the time-series data within the current seasonal period and the current window. 14. The apparatus of claim 11, wherein the memory further stores instructions that, when executed by the one or more processors, cause the apparatus to: transform the baseline values to generate one or more severity levels associated with the anomaly after the deviation is found; repeat the statistical hypothesis test with the transformed baseline values to identify a severity of the anomaly; and include the severity of the anomaly in the outputted alert. 15. The apparatus of claim 11, wherein obtaining the one or more intervals of the time-series data collected during the execution of the monitored system comprises: aggregating the time-series data within the one or more intervals. 16. The apparatus of claim 15, wherein the aggregated time-series data comprises at least one of: a median; a mean; a quantile; a variance; and a count. 17. The apparatus of claim 11, wherein the statistical hypothesis test comprises a sign test. 18. A system, comprising: an analysis module comprising a non-transitory computer-readable medium comprising instructions that, when executed by one or more processors, cause the system to: obtain a current window of one or more intervals of time-series data collected from a monitored system; and perform a statistical hypothesis test that compares the one or more intervals of the time-series data with baseline values from historic time-series data associated with the monitored system; and a management module comprising a non-transitory computer-readable medium comprising instructions that, when executed by the one or more processors, cause the system to output an alert of an anomaly represented by the deviation when the statistical hypothesis test indicates a deviation of the time-series data from the baseline values. 19. The system of claim 18, wherein the non-transitory computer-readable medium of the analysis module further comprises instructions that, when executed by the one or more processors, cause the system to: generate the baseline values from the historic time-series data based on a seasonality of the time-series data. 20. The system of claim 18, wherein the non-transitory computer-readable medium of the analysis module further comprises instructions that, when executed by the one or more processors, cause the system to: transform the baseline values to generate one or more severity levels associated with the anomaly after the deviation is found; repeat the statistical hypothesis test with the transformed baseline values to identify a severity of the anomaly; and include the severity of the anomaly in the outputted alert.