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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).
- Interpretation of regression coefficients with multiple categorical ...It's the difference between the (predicted) mean of girls in girls-only schools and the (predicted) mean of girls in mixed schools. You can see this by looking at the design matrix or solving for a predicted value using the fitted regression equation. Let's make some simple data and work through this.
- probability - What is the expected number of children until having the ...You can consider starting from position 1 for the difference of boys/girls and move up and down randomly with 50% probability until reaching zero. These type of walks have been described here: What is the distribution of time's to ruin in the gambler's ruin problem (random walk)? and based on the results in those answers we can see that the ...
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