Data analysis in R

Data - is a set of values of qualitative or quantitative variables. Data is measured, collected and reported, and analyzed, whereupon it can be visuzlised using graphs, images and other analisys tools. Data is obtained as a result of measurements.

Data analysis - is a process of inspecting, cleansing, transforming, and modeling data with the goal of discovering useful information, suggesting conclusions, and supporting decision-making. Data analysis has multiple facets and approaches, encompassing diverse techniques under a variety of names, in different business, science, and social science domains.

Descriptive statistics (in the count noun sense) - is a summary statistic that quantitatively describes and summarizes features of a collection of information, while descriptive statistics are in the mass noun sense - is the process of using and analyzing those statistics.

Frequency distribution - is the orderly arrangement of data classified according to the magnitude of the observations.

Mean - is the average of all values in a distribution.

Median - is the positional average that divides a distribution into two equal parts so that one half of items falls above it and the other half below it. The midpoint of a distribution of values is called the median.

Mode - is  the  most  frequently  occurring  value  in the  set  of  scores.

Problem statement - the defining stage on which entire analysis progress depends.defining stage on which the entire analysis progress depends - begins with the stage of formulating the purpose of whole research, for achievement of which data was collected and processed. Basing on purpose, list of necessary data is determined.

Qualitative Data Analysis (QDA) - is the range of processes and procedures whereby we move from the qualitative data that have been collected into some form of explanation, understanding or interpretation of the people and situations we are investigating. The idea is to examine the meaningful and symbolic content of qualitative data.

Relative frequency distribution - is a distribution in which relative frequencies are recorded against each class interval.