Publications by Arash Hatamirad

Multiple Linear Regression, Model Selection

Use significance levels of .05 unless the instructions state otherwise. Data Sets: You need to download dataset birthweight_final.csv. The data record live, singleton births to mothers between the ages of 18 and 45 in the United States who were classified as black or white. There are total of 400 observations in birthweight, and variables are: -...

6067 sym R (13504 sym/30 pcs) 3 img

Data Visualization with ggplot

Initalizing # Read data d1 <- read_dta("tech_co_cstat_dta.zip") #psych::describe(d1) #glimpse(d1) #names(d1) #head(d1) #attributes(d1$tic) # put data for Sale>0 into d2 d2 <- filter(d1,sale>0) d1<- d2 %>% mutate(conm = stringr::str_to_title(conm)) # Converts the string to title case Q1 Create a bar graph of the average annual pr...

2464 sym R (3004 sym/14 pcs) 7 img