Useful tips for everyday
What is the posterior in Bayes? A posterior probability, in Bayesian statistics, is the revised or updated probability of an event occurring after taking into…
Does probability density function always exist? The probability mass function of a discrete random variable is the density with respect to the counting measure over…
How is polynomial regression used in classification settings? Such variables are also used in classification settings. Polynomial regression models are usually fit using the method…
How do you know if a graph is normally distributed? In order to be considered a normal distribution, a data set (when graphed) must follow…
What happens to margin of error when sample size increases? The relationship between margin of error and sample size is simple: As the sample size…
What is a irreducible Markov chain? A Markov chain in which every state can be reached from every other state is called an irreducible Markov…
How do you calculate sample size for a retrospective study? The do’s and do not’s for determining the sample size of a retrospective study are:…
What is the variance of a variable that has a standard normal distribution? The ‘standard normal’ is an important distribution. A standard normal distribution has…
How are logs used as a predictor in regression? Logs as the Predictor The interpretation of the slope and intercept in a regression change when…
How do you create a uniform distribution in Matlab? Description. X = rand returns a single uniformly distributed random number in the interval (0,1). X…