Essays on Scatterplot

Abstract

Regression analysis estimates the value of a random variable (dependent variable) for a given value of an associated independent variable. The regression equation provides the formula for such a calculation. In the present case, which is about the analysis of the dependence of total monthly sales on the monthly customer traffic, the consultant first examines to see if there is a correlation between the two variables. To achieve this, the consultant uses the scatterplot, plotting the points on a graph. After analyzing the scatterplot, the consultant is convinced that there exists a strong positive linear correlation between the two ...

In any type of company, one of the significant challenges for leadership is connecting industry knowledge and business analytics. Bartlett (2013) observes that these two components serve as the primary sources of information for decision makers. Managers generally hold much insight and wisdom in their accumulated experience, but unfortunately, any gaps in the facts are commonly filled with opinions (Bartlett, 2013). Instead of relying on subjective sources, leaders can utilize business analytics to validate new ideas and test industry beliefs (Bartlett, 2013). A starting point for effective business analytics is to recognize that data and information are not ends ...

Marriot International Inc. is considered the most important hotel chain in the world with 3400 hotels and resorts including 750 thousand rooms. Table 1 shows the revenues by sales and net income of the company from 2009 to 2015. Each variable, sales revenues and net income are independent variables that depend on of the independent variable which is the year. Both sales revenues and net income have a relation where the net income is always lower than the sales revenues, according to finance administration theories. In Figure 1 it is possible to plot both variables related to the year. ...

Human development is a process of providing mechanisms through which people can flourish and attain self-actualization in their lives. The rationale of human development as a process goes beyond focusing on economic development as an indicator of people’s wellbeing. It therefore incorporates other dimensions which are crucial in establishing the extent to which people would describe quality life. Traditionally, most economists have used quantitative indicators such as GDP Per capita as a measure of people’s wellbeing in a particular economy. The reality is however, different because quantitative indicators such as these are limited to assessing economic success ...

d <- file.choose(); d <- as.data.frame(read.csv(d), header=T)

require(foreign) library(foreign) // the ID number is even, hence we take the first 71 observations d<-d[1:71,] // Check the new data set: d // Choose variables participating in the assignment: 292302%%13+2 [1] 12 2302%%13+2 [1] 3 // Our explanatory variables are variable #3 (lgdp2) and #12 (gcony2) //Now plot a loess regression for variable #3 scatter.smooth(d[,2]~d[,3]) abline(lm(d[,2]~d[,3]),col="red", lwd=4) // Add a robust linear regression and add a blue line ...

Most statistical analyses have two or three variables, such data are visualized by use of 2D scatter plots and 3D scatter plots respectively. However, there are some datasets which involve more than three variables, this is called multivariate data. There are several ways with which multivariate data can be visualized. Such methods include Parallel Coordinates Plots, Scatterplot Matrices, Andrews Plots, Glyph Plots and Glyph Plots used together with Multidimensional Scaling.

Scatterplot Matrices involve viewing slices through the lower dimensional subspaces, for instance, using a gplotmatrix function, which displays bivariate Scatterplot of many variables and a histogram for every individual variable. The ...