Question 1. Make five graphs of api99: histogram, kdensity plot, boxplot, symmetry plot and normal quantile plot. Answer 1. First we use the elemapi2 data file. use https://stats.idre.ucla.edu/stat/stata/webbooks/reg/elemapi2, clear Below…
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Chapter Outline 2.0 Regression Diagnostics 2.1 Unusual and Influential data 2.2 Checking Normality of Residuals 2.3 Checking Homoscedasticity 2.4 Checking for Multicollinearity 2.5 Checking Linearity 2.6 Model Specification 2.7 Issues…
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1. The following data set consists of measured weight, measured height, reported weight and reported height of some 200 people. You can get it from within Stata by typing use…
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1. The following data set consists of measured weight, measured height, reported weight and reported height of some 200 people. We tried to build a model to predict measured weight…
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Chapter Outline 3.0 Regression with Categorical Predictors 3.1 Regression with a 0/1 variable 3.2 Regression with a 1/2 variable 3.3 Regression with a 1/2/3 variable 3.4 Regression with multiple categorical…
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1. Using the elemapi2 data file ( use https://stats.idre.ucla.edu/stat/stata/webbooks/reg/elemapi2 ) convert the variable ell into 2 categories using the following coding, 0-25 on ell becomes 0, and 26-100 on ell…
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1. Using the elemapi2 data file ( use https://stats.idre.ucla.edu/stat/stata/examples/ara/elemapi2 ) convert the variable ell into 2 categories using the following coding, 0-25 on ell becomes 0, and 26-100 on ell…
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  Chapter Outline 4.1 Robust Regression Methods 4.1.1 Regression with Robust Standard Errors 4.1.2 Using the Cluster Option 4.1.3 Robust Regression 4.1.4 Quantile Regression 4.2 Constrained Linear Regression 4.3 Regression…
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Chapter Outline 4.1 Robust Regression Methods         4.1.1 Regression with Robust Standard Errors         4.1.2 Using the Cluster Option         4.1.3 Robust Regression         4.1.4 Quantile Regression…
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1. Use the crime data file that was used in chapter 2 (use https://stats.idre.ucla.edu/stat/stata/webbooks/reg/crime ) and look at a regression model predicting murder from pctmetro poverty pcths and single using…
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