By RAFAŁ WAŚKO (Predictive Solutions) The Student’s t-test group is used to compare two groups of results, measured by the arithmetic mean, against each other. WHAT DO THE T-TESTS TEST? These types of tests will be useful to us when we want to determine whether...
By RAFAŁ WAŚKO (Predictive Solutions) The chi-square test of independence is one of the most popular statistical tests. It is used to check whether there is a statistically significant relationship between two qualitative variables. It is based on comparing the...
By RAFAŁ WAŚKO (Predictive Solutions) Customer Effort Score (CES), along with Net Promoter Score (NPS), and Customer Satisfaction (CSAT), is one of the key indicators related to clients’ satisfaction. All these three indicators are intended to understand the...
By NATALIA GOLONKA (Predictive Solutions) The Customer Satisfaction Index (CSI) is a method used in marketing to evaluate client satisfaction derived from products or services being provided by a company or organisation.Using a short questionnaire it is...
By RAFAŁ WAŚKO (Predictive Solutions) The main idea of regression is to predict the value of a dependent variable (otherwise known as predictor, explained variable) based on one or more independent variables (called predictors, explanatory variables). The simplest...
By RAFAŁ WAŚKO (Predictive Solutions) Researching customer satisfaction and loyalty is currently an inseparable part of running a business that is focused on developing and building their advantage over competitors. Currently, the standard in this respect is the NPS...
