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Bookmark or Share- what is the difference between a two-sample t-test and a paired t-testWhile I was glancing at hypothesis tests, I saw paired and two-sample t-test but couldn't understand the difference. For the explanation of these two tests, I saw the following sentence " Two-...
- probability - As sample size increases, why does the standard deviation ...As sample size increases (for example, a trading strategy with an 80% edge), why does the standard deviation of results get smaller? Can someone please explain why standard deviation gets smaller and
- Why is gender typically coded 0/1 rather than 1/2, for example?$\begingroup$ Using a 0/1 coding scheme is essentially useful when applying regression models among others, although several coding schemes are possible, e.g. -1/1 (but it will change the interpretation of the regression coefficients).
- regression - Building a linear model for a ratio vs. percentage ...Echoing the first answer. Don't bother to convert - just model the counts and covariates directly. If you do that and fit a Binomial (or equivalently logistic) regression model to the boy girl counts you will, if you choose the usual link function for such models, implicitly already be fitting a (covariate smoothed logged) ratio of boys to girls.
- Significance test for difference in two proportions over time with ...So, for example, the proportion of 3rd graders with blonde hair, comparing boys and girls, if every year I measured a sample of 3rd grade boys and girls. I thought of this perhaps as a repeated measures analysis, but decided against it because these are actually independent samples, each year there is a total new crop of 3rd graders.
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