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Boxplot - IQ
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library(dplyr)
# Data inlezen:
data <- read.csv(
"https://raw.githubusercontent.com/RobbeW/Data_Statistiek_R/main/bronnen/BRAINSIZE.csv",
na.strings = c(".", "NA", ""),
strip.white = TRUE,
stringsAsFactors = FALSE
)
# Kolommen hernoemen (Engelse begrippen naar NL):
names(data)[names(data)=="Gender"] <- "geslacht"
names(data)[names(data)=="MRICount"] <- "MRI"
# Eenheden omzetten: lbs→kg, inch→cm:
data$massa <- as.numeric(data$Weight) * 0.45359237
data$lengte <- as.numeric(data$Height) * 2.54
# Alleen gewenste kolommen:
data <- data[c("geslacht","FSIQ","VIQ","PIQ","massa","lengte","MRI")]
# Beantwoord hieronder de vragen:
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