Useful tips for everyday
Why assume population variances are equal? In situations when we do not know the population variances but assume the variances are the same, the pooled…
What is association rule in WEKA? Association rule learners find associations between attributes. Between any attributes: there’s no particular class attribute. Rules can predict any…
When you change the hypothesis What happens to the critical region? If the alternative hypothesis concerns the mean being greater than the null hypothesis then…
Why does R-fitting ARIMA return the same error? But it returned the same error with an extra warning: I had the exact same issue when…
How do you distribute with absolute value? Further, absolute value bars are NOT parentheses, so you can’t just willy-nilly distribute across them. The only thing…
How many ways can you add to 7? Six and one make seven. And finally, if we move all the beads to the other side,…
How many observations can you have with one random factor? You’d have one between-subject factor (beverage) and 100 observations per subject, for say, 20 subjects…
What happens if you double your sample size? Doubling s doubles the size of the standard error of the mean. Bigger samples produce smaller standard…
What is a nested CFA model? A chi-square difference test can be conducted using chi-square values and degrees of freedom from any two nested models.…
What is meta classifier? 1. A classifier, which is usually a proxy to the main classifier, used to provide additional data preprocessing. Learn more in:…