Regression Analysis: A Guide to Modeling Predictive Relationships
Regression
Regression is a well-known statistical technique used to model the predictive relationship between several independent variables (DVs) and one dependent variable. The objective is to find the best-fitting curve for a dependent variable in a multidimensional space, with each independent variable being a dimension. The curve could be a straight line, or it could be a nonlinear curve. The quality of fit of the curve to the data can be measured by a coefficient of correlation (r), which is
Read MoreStatistical Concepts: A Comprehensive Guide to Measures, Tests, and Relationships
Measures of Central Tendency and Variability
Nominal, Ordinal, Interval, and Ratio Scales
Nominal = qualitative number, categories, no numerical relationship between categories, Ordinal = ranking of categories, do not know how much greater each category is, Interval = continuous (magnitude difference between two values can be determined), placement of zero is arbitrary (e.g., Celsius), Ratio = continuous, zero has a natural interpretation
Sampling Distribution
A sampling distribution is a probability
Read MoreStatistics: Scope, Applications, and Techniques
Scope of Statistics
Through statistical analysis, business executives gain insights into market trends, customer demands, and purchasing patterns. This knowledge guides product development, marketing strategies, and customer relationship management, ensuring sustained growth and competitiveness.
Statistics is the discipline that concerns the interpretation, analysis, organization, collection, and presentation of data. The scope of Statistics is very immense, the application of statistics goes into
Read MoreSin título 1
Covariance matrix(S)–>In diagonal it have variances (spread) and in off-daigonal covariances (pos and orientation). Measure the linera dependency between observations of each pair of vars. Its rank determines the number of linearly independent variables in the data matrix and it is also the number of eigenvalues different from 0. >varaince — >spread — <>Generalizated variance (|S|)–> When |S|=0 there are some variables that are linear combinations of the others. If eigenvector
Read MoreMIRI
1.Dorsal and ventral stream.
Dorsal stream: stream of processing ascends from the occipital cortex to the parietal cortex and is involved in spatial awareness and action. It is often referred to as the ‘where’ or ‘how’ pathway because of its functions. Ventral stream: Also known as the ventral pathway, this stream of processing descends from the occipital cortex to the inferior temporal cortexand is involved in objects recognition. It is often referred to as the ‘what’ pathway owing
Read More