Multiple Regression Analysis Question 1 The overarching objective is to assess the demographic variables that influence the perceptions of faculty members toward the organizational justice. In particular, the demographic variables include the occupation of the faculty members, rank, experience, and size. Various analyses are performed on the data, including descriptive and inferential analysis. Notably, the measures for occupation, rank, and the perceptions of faculty members are categorical…
months. Notably, forecasting entails application of simple linear regression in order to understand the underlying relationship between sales volumes and number of hits on the company’s website. In this case, an Excel worksheet is used to analyze the data, and to forecast the sales based on the data collected on the number of hits. Chase (2013) explains that forecasting in business scenarios entails…
Weighted Regression (GWR) method was used to interpolate climate characteristics at station level to spatial grids, generating both the interpolated value and the standard error estimation at each grid point. It is a localized regression based method widely used for spatial interpolation, accounting for the spatial inhomogeneity with spatially varying slopes and intercepts. At each prediction location, the GWR picks up nearby training data points and constructs a weighted linear regression model…
First, the variable Percentage Black Students had a medium negative correlation (r = -0.59) to QDI. A linear regression analysis using Black Student Percentage as the independent variable and QDI the dependent variable resulted in a linear regression equation with a y-intercept of 163.11 and a slope of -0.27, which is statistically significant due to a p value of 0.01. The results of the regression analysis for these variables can be seen below in Figure…
estimated by summing the related variables into one main variable. Three-step hierarchical regression analysis is used to test the framework. Hierarchical regression analysis is useful when prior literature or theory identifies sequence of variables to be added to the regression equation. Each step includes a set of variables which will affect the outcome variable in one direction. Therefore, using hierarchical regression will help us to identify the effects of control variables, independent…
Correlation and Regression Students who demonstrate academic success during their undergraduate studies surpass in the graduate program. The students performing academically favorable during their undergraduate courses tend to adapt better to the Master’s program because they have good study habits in addition to discipline. Nowadays the traditional MBA student takes one or two courses at a time, during the evening or weekends. Some students support their family while working full time. An…
There were two single linear regressions made for the data set. A new independent variable was made for each. The independent variable for the first single linear regression was recoded as associate and below. This particular variable included the data for the educational levels of an associate degree or lower education. In the second single linear regression the independent variable was labeled bachelor and above. This new variable included the data for the educational levels of a bachelor…
Regression-Discontinuity Design. A powerful, alternative design for causal inference that is underutilized in the health and intervention sciences is the regression discontinuity (RD) design (Thistlewaite & Campbell, 1960). In its simplest form, the RD design involves the use of a screening measure of some form that is continuous and given to all persons. A cut point or criterion is set, which determines whether individuals are assigned to an intervention condition or a comparison condition. The…
4.2 Multiple Regression A regression model was run to predict the wine rating from different features (fixed.acidity, volatile.acidity, citric.acid, residual.sugar, chlorides, free.sulfur.dioxide, total.sulfur.dioxide, density, pH, sulfates, alcohol) of wine in R. According to the initial analysis on the distributions of the features, many of those features are right-skewed and thus require log transformation. Forward Selection Algorithm was used to find the best predictive models for wine…
Total oil expenditure to Total food expenditure (R) .θ is the disturbance term, α is the intercept term and a, b, c, d, e and f are the corresponding coefficients of the independent variables. Based on the survey data obtained from 360 respondents a regression model is constructed. Ordinary Least Square Estimation technique is used to estimate the parameters. The overall significance of the model was tested using One way ANOVA (F test) which yielded an F value 49.190 and the exact probability…