Useful tips for everyday
What is median smoothing? Median Smoothing. • medsmooth(v, [n], [m])—Returns a smoothed vector by replacing each value in v with the median of the n…
Can a Poisson regression be left or right censored? Outcomes can be left-censored if they are not observed when they are below a certain level…
Which is an example of a weak instrument? Austin Nichols Weak instruments: An overview and new techniques. Instrumental Variables Weak Instruments References Overview of IV…
How do you seasonally adjust time series data? Time Series Analysis: Seasonal Adjustment Methods Estimate the trend by a moving average. Remove the trend leaving…
What does GREY zone mean? Definition. The grey-zone is defined as “competitive interactions among and within state and non-state actors that fall between the traditional…
How does PCA help with multicollinearity? Hence by reducing the dimensionality of the data using PCA, the variance is preserved by 98.6% and multicollinearity of…
What is stationarity time series? A stationary time series is one whose properties do not depend on the time at which the series is observed.…
How to cross validation for model selection procedure? Cross-Validation for Selecting a Model Selection Procedure∗ Yongli Zhang LundQuist College of Business University of Oregon Eugene,…
Does Linear Regression have closed form solution? Normal Equation is the Closed-form solution for the Linear Regression algorithm which means that we can obtain the…
Are estimates random? Being a function of the data, the estimator is itself a random variable; a particular realization of this random variable is called…