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Explain it back
In your own words, what does a 95% confidence level describe, and why isn’t it a 95% chance that the mean lies in this one interval?
Your answer
The 95% is about how often the method works if we kept sampling. If we drew lots of samples and built an interval from each one, about 95% would contain the true mean. Once we have one interval, the mean is either in it or not.
FeedbackSomething to revisit
You explained repeated intervals and the fixed mean clearly. Your last sentence changes what the interval describes: it is about the mean, not about 95% of students’ hours.
Next: restate your final sentence so it describes the population mean.
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Screenshots from the Parlor Study web app, October 2026, using a demo account, the free sample course and a demo statistics lecture. AI feedback and maps can be wrong.
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Guides and worked examples you can read without signing in.
Book study guidesFrankenstein, Pride and Prejudice, The Great Gatsby and more, with chapter questions
Reading comprehensionRead a short scene and compare your interpretation with an example
Studying lecture notesTurn your own notes into explanation and practice
How long to read the classicsReading time for every chapter of 100 commonly assigned books
The research behind itWhy highlighting feels productive, and what helps instead. Contains actual footnotes.
Questions
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Parlor Study is a browser-based study companion from Nevel Trade Inc. It brings reading, AI-assisted discussion, and practice with lecture material into one place.
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