Useful tips for everyday
What are weights in AdaBoost? Simply put, the idea is to set weights to both classifiers and data points (samples) in a way that forces…
Is there an implementation of linear regression in Python? Linear Regression (Python Implementation) This article discusses the basics of linear regression and its implementation in…
What are time-varying models? Time-varying effect modeling (TVEM) allows scientists to understand the way associations between variables change over time. TVEM is an extension of…
What is hypothesis in linear regression? Hypothesis Testing in Linear Regression Models. the null hypothesis is to calculate the P value, or marginal significance level,…
Can you calculate standard deviation from percentages? The relative standard deviation (RSD) is often times more convenient. It is expressed in percent and is obtained…
How do you make an instrumental variable? Instrumental Variables regression (IV) basically splits your explanatory variable into two parts: one part that could be correlated…
Can panel data have autocorrelation? This applies to an individual time series. As Michael Chernick points out in his comment, panel data consists of several…
What are the covariances of an ARMA process? Essentially, the initial qcovariances of an ARMA(p;q) process deviate from the recursion that de nes the covariances…
What makes a function nonlinear? Non-linear means the graph is not a straight line. The graph of a non-linear function is a curved line. Although…
Why are decomposition procedures used in time series? Decomposition procedures are used in time series to describe the trend and seasonal factors in a time…