Useful tips for everyday
What is factor variance in CFA? * Factor variance: how much individuals differ on the factor. * Factor mean: the average score on the factor.…
How is Ljung-Box test calculated? Both approximate a chi-squared statistic, based on autocorrelations up to order p. Box Pierce test statistic: n * sum of…
Can you do a hypothesis test for standard deviation? A hypothesis test for a population mean when the population standard deviation, σ, is unknown is…
How is the chi squared distribution an asymptotic property? Asymptotic properties. The chi-squared distribution is obtained as the sum of the squares of k independent,…
How does standard error increase? Standard error increases when standard deviation, i.e. the variance of the population, increases. Standard error decreases when sample size increases…
What is X in hypothesis testing? where x is the sample mean, μ is the hypothesized population mean in the null hypothesis, and SE is…
Which is the best description of an uninformative prior? Uninformative priors. An uninformative prior or diffuse prior expresses vague or general information about a variable.…
What is rank loss? Ranking loss: This name comes from the information retrieval field, where we want to train models to rank items in an…
Why are they called z scores? The standard score (more commonly referred to as a z-score) is a very useful statistic because it (a) allows…
Can you control for variables in a t-test? By means of t-test you are assessing whether there is a significant difference between two sets of…