You gather data from all Stonehill students, by asking them to complete a scale that measures levels of stress. You measure their stress at the beginning of the fall semester, and then again during finals week of the fall semester. You compare average level of stress at the beginning of the semester to average level of stress during finals week. Which statistical test would you use to examine if there is a significant difference between students’ stress at the beginning of the semester and their average levels of stress during finals?

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.