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9 lines
684 B
Markdown
9 lines
684 B
Markdown
## Assumptions and Learnings
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- probability density function expected value
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- Confidence interval is not my value * confidence, it's confidence chance of being in my range
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- I've made some mistakes in stat review, looking at narrow topics before covering broader parent topics. Should reorganize structure (tree, not list?)
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t-test, z-test: both are hypothesis tests
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The t-test is used when the population variance is unknown, or the sample size is small (n < 30)
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The z-test is used when the population variance (σ2) is known *and* the sample size is large (n > 30)
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To create a z-distribution table, mathematicians calculate the CDF for various z-scores and tabulate the results. |