Statistics in R Series — Introduction Simple logistic regression incorporates only one predictor variable and we have implemented it using R previously. We have also discussed on the statistics for goodness-of-fit. Oftentimes, the real world data has several predictor variables. Sometimes we simply don’t know if including the extra variable as a predictor will make…

Statistics in R Series: Deviance, Log-likelihood Ratio, Pseudo R² and AIC/BIC — Introduction In simple logistic regression, we try to fit the probability of the response variable’s success against the predictor variable. This predictor variable can be either categorical or continuous. We need to quantify how good the model is. There are several goodness-of-fit measurements that indicate the goodness-of-fit.

Adjusted Boxplot for skewed distribution — Introduction In the pervious article, I have discussed about outlier detection procedures for mostly normal distributions. The procedures include IQR (Inter-Quartile Range) Standard deviation Z-score Modified Z-score We have gone through the boxplots after these abovementioned procedures are implemented and shown the number of outliers in each case. In real…

IQR, Hampel and DBSCAN method — Outliers, one of the buzzwords in the manufacturing industry, has driven engineers and scientists to develop newer algorithms as well as robust techniques for continuous quality improvement. If the data include even if one outlier, it has the potential to dramatically skew the calculated parameters. Therefore, it is of utmost…

Statistics in R Series — Introduction We have covered simple logistic regression for ordinal variables in the last article which became quite interesting when looking at the result. In this article, I will discuss multiple logistic regression for similar ordinal data and also predict the probabilities using R packages. …

Time is relative to our reference frame — What are the things that can happen in one second? You can probably take 2–3 steps in one second or blink your eyes twice in one second. These events are very insignificant when we talk about cosmology. Even the birth of a new star is also very insignificant in the…

Inflation and Rate Hikes to be blamed — The inflation rate is still very hot although it has dropped to 8.2% in September 2022 [Statista] compared to 8.3% in August 2022. There is no sign of getting it curved in coming weeks and that will trigger the Fed to increase the interest rate another round on November 02…

Determine your monthly numbers — In this article I am going to show you how to calculate the interest and principal portion of a 30-year mortgage loan. For simplicity, let’s assume that the loan amount is $100,000, the annual interest rate is 5% and the duration of the loan is 30 years. …

Real estate being affected the most — The Fed has increased the interest rate again by 75 basis points last week. It means that the cost of borrowing money has got even higher. Does the Fed really not want the people to buy a home or invest in real estate right now? …