There are five psychographic segmentation variables on the basis of which homogeneous segments can be prepared for proper research – Personality, Lifestyle, Social Status, AIO (Activities, Interests, Opinions), and Attitudes. What is a psychographic variable? Psychographic Segmentation Variables Psychographic variables are the factors that help you to identify and splitRead More →
How To: Given a system of two equations in two variables, solve using the substitution method. Solve one of the two equations for one of the variables in terms of the other. Substitute the expression for this variable into the second equation, then solve for the remaining variable. How manyRead More →
Independent variables are variables that are manipulated or are changed by researchers and whose effects are measured and compared. The other name for independent variables is Predictor(s). What are independent predictors? I mean in a statistical model, a predictor is assumed an independent variable. It seams that sometimes “independent predictor”Read More →
Multicollinearity means “Independent variables are highly correlated to each other”. For categorical variables, multicollinearity can be detected with Spearman rank correlation coefficient (ordinal variables) and chi-square test (nominal variables). Can VIF be used on dummy variables? When a dummy variable that represents more than two categories has a high VIF,Read More →
About Spectrograms (Spectrogram / 3D Map) Spectrograms use the Y-axis for time (one trace/measurement sweep per line). The amplitude, which would have been shown on the Y-axis, is represented by color. The X-axis of the spectrogram still represents the X-axis of the underlying trace data. How do you describe aRead More →
In JavaScript, you can reassign values to variables you declared with let or var . Can const be Redeclared? Constants are block-scoped, much like variables declared using the let keyword. The value of a constant can’t be changed through reassignment, and it can’t be redeclared. Can var be a string?Read More →
The norm is to place the independent variable on the “x”or horizontal axis and the dependent variable on the “y” or vertical axis. What are examples of independent and dependent variables? Independent variable causes an effect on the dependent variable. Example: How long you sleep (independent variable) affects your testRead More →
When you assign a variable, you use the = symbol. The name of the variable goes on the left and the value you want to store in the variable goes on the right. Here we’ve assigned the value ‘Joe’ , which is a string, to the variable first_name . WhatRead More →
Find the mean of all the x-values. Find the standard deviation of all the x-values (call it sx) and the standard deviation of all the y-values (call it sy). … For each of the n pairs (x, y) in the data set, take. Add up the n results from StepRead More →
A control variable (or scientific constant) in scientific experimentation is an experimental element which is constant and unchanged throughout the course of the investigation. … The control variables themselves are not of primary interest to the experimenter. Are controls and variables the same? A control variable isn’t the same asRead More →