Useful tips for everyday
When to use exogenous variable in ARIMA model? Now, there are some intuitive variables that one can introduce in the model based on subjective understanding…
How is the gradient computed? along the computational graph in order to compute the gradients. Forward propagation and backpropagation for a one-layer neural network. downstream…
What is the distribution of correlation coefficient? population correlation coefficient), the statistic S= (1 + r)/(l – r), where r is the sample corre- lation…
Does same CDF imply same PDF? X and Y, 2 random variables are identically distributed iff they have same CDF. But identically distributed means having…
How many times do you expect to get 2 heads? If you flip a fair coin twice, the possible outcomes are heads-heads, heads-tails, tails- heads,…
Why are errors normally distributed? One reason this is done is because the normal distribution often describes the actual distribution of the random errors in…
What is C and C in mediation? Simple mediation diagram; a, b, c and c’ are path coefficients representing unstandardized regression weights and standard errors…
Is it possible to run multiple regressions with multiple IVs? I do have a latent variable (motives) with 3 subscales (egoistic, altruistic and biospheric, level:…
What is the sum of sensitivity and specificity? Maximization of the sum of sensitivity and specificity is formally equivalent to minimization of the sum of…
What is a true alternative hypothesis? In statistical hypothesis testing, the alternative hypothesis is a position that states something is happening, a new theory is…