Useful tips for everyday
Do you measure or change the dependent variable? The independent variable is the variable the experimenter manipulates or changes, and is assumed to have a…
What is the probability of getting number 3 when you roll a single die? Two (6-sided) dice roll probability table. Single die roll probability tables….Probability…
Do SVMs require scaling? Before applying SVM, we need to scale data. We need to perform scaling of data before testing it. We have taken…
Why is it important to have independent and dependent variables? Dependent and independent variables are important because they drive the research process. Dependent and independent…
What information does a p value yield? A p-value is a measure of the probability that an observed difference could have occurred just by random…
What are constraints in linear regression? Your constraint implies that you are regressing y on a single variable x1+x2 and forcing its coefficient to be…
Does Arima work for stocks? To predict an outcome based on time series data, we can use a time series model which is called Auto…
How to use time series to predict electricity consumption? Since we are now familiar with a basic flow of solving a time series problem, let…
Why do we use log return? Log return is used for statistical evaluation such MSPE and out-of-sample R-square. Simple return is used for calculating economic…
How are random errors used to analyze data? Random errors often have a Gaussian normal distribution (see Fig. 2). In such cases statistical methods may…