Useful tips for everyday
Is the sum of two random variables also a random variable? Probability distributions are determined by assigning an expectation to each random variable. the sum…
Is the mean squared error the same as variance? The MSE is a measure of the quality of an estimator. For an unbiased estimator, the…
Can you get an odds ratio from a chi-square test? An odds ratio is one way, commonly used with 2 x 2 tables, of saying…
Does correlation use independent and dependent variables? Pearson’s correlation coefficient measures the relationship of two variables (Dependent and Independent) without eliminating the influence of other…
How to find number of autoregressions in ARIMA model? It helps to identify the number of autoregression (AR) coefficients (p-value) in an ARIMA model. The…
Is linear regression and logistic regression are both used for regression problems? Linear regression is used for regression or to predict continuous values whereas logistic…
What does the coefficient tell you in a multiple regression? Coefficients. In regression with multiple independent variables, the coefficient tells you how much the dependent…
How do you calculate failure rate reliability? The formula for failure rate is: failure rate= 1/MTBF = R/T where R is the number of failures…
How do you correct autocorrelation in regression? There are basically two methods to reduce autocorrelation, of which the first one is most important: Improve model…
Why do we need a dummy variable? Dummy variables are useful because they enable us to use a single regression equation to represent multiple groups.…