Useful tips for everyday
What does it mean for a random variable to be deterministic? If the outcome of a variable is fixed, i.e. if a variable will always…
What is test of multicollinearity? Fortunately, there is a very simple test to assess multicollinearity in your regression model. The variance inflation factor (VIF) identifies…
What is the variance of two independent variables? For independent random variables X and Y, the variance of their sum or difference is the sum…
What is the complexity of an algorithm in best case? Sorting algorithms Algorithm Data structure Time complexity:Best Quick sort Array O(n log(n)) Merge sort Array…
Should I use SEM or SD? It helps present data precisely and draws the meaningful conclusions. SEM quantifies uncertainty in estimate of the mean whereas…
What should the standard deviation be for a normal distribution? 1 The standard normal distribution is a normal distribution with a mean of zero and…
When would a polynomial model make sense? We use polynomial models to estimate and predict the shape of response values over a range of input…
Why do we use t-test in regression? t Tests. The t\,\! tests are used to conduct hypothesis tests on the regression coefficients obtained in simple…
Which is the dependent variable in logistic regression? The dependent variable is binary or dichotomous —i.e. It fits into one of two clear-cut categories. This…
How is inter-rater reliability measured? The basic measure for inter-rater reliability is a percent agreement between raters. Percent agreement is 3/5 = 60%. To find…