Useful tips for everyday
What are behavioral analysis tools? What are Behavioral Analysis Tools? There are three main behavioral analysis tools involved in building a complete picture of your…
How do you make a biased coin unbiased? How can you use a biased coin to make an unbiased decision? That is to say the…
How to find maximum order of Fourier terms in Arima? From the table above we can see that the main seasonality detected is 7.02 days,…
What is time translation invariance? Time translation symmetry or temporal translation symmetry (TTS) is a mathematical transformation in physics that moves the times of events…
Which method is used for trend in forecasting? Top Four Types of Forecasting Methods Technique Use 1. Straight line Constant growth rate 2. Moving average…
What statistical test do you use for correlation? In this chapter, Pearson’s correlation coefficient (also known as Pearson’s r), the chi-square test, the t-test, and…
What is beta in Poisson distribution? Consider a Poisson distributed random variable Y with mean τ(1 − p), where τ is an unknown parameter and…
Why is sample variance squared? The calculation of variance uses squares because it weighs outliers more heavily than data closer to the mean. This calculation…
What is rotation in principal component analysis? What Is Rotation? In the PCA/EFA literature, definitions of rotation abound. For example, McDonald (1985, p. 40) defines…
When is the Ar ( 2 ) process is stationary? When these solutions, in absolute value, are smaller than 1, the AR (2) model is…