Useful tips for everyday
What research design would be best to test the effectiveness of an intervention? Traditional study designs such as randomized controlled trials (RCTs) can be ideal…
Are PCA features uncorrelated? Principal component analysis (PCA) is a statistical procedure that uses an orthogonal transformation to convert a set of observations of possibly…
What is regression analysis and its types? Regression is a technique used to model and analyze the relationships between variables and often times how they…
How do I know if my data is normally distributed in Matlab? The normal distribution uses these parameters. The standard normal distribution has zero mean…
What is a three-way repeated measures ANOVA? The three-way repeated measures ANOVA is used to determine if there is a statistically significant interaction effect between…
What is conditional CDF? The conditional CDF of X given A, denoted by FX|A(x) or FX|a≤X≤b(x), is FX|A(x)=P(X≤x|A)=P(X≤x|a≤X≤b)=P(X≤x,a≤X≤b)P(A). Now if x What are cumulative probabilities?…
How do you know if there is a significant difference in standard deviation? “A significant standard deviation means that there is a 95% chance that…
What is jackknife cross-validation? In the jackknife test, if there are total of N members in dataset, then the predictor is trained on N −…
What is combination forecasting? An easy way to improve forecast accuracy is to use several different methods on the same time series, and to average…
Can you measure two independent variables? Yeah, it is possible to measure the relationship between an independent and two or more dependent variables. – your…