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Examenscores - Versie B
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library(dplyr)
# Data inlezen:
data <- read.csv(
"https://raw.githubusercontent.com/RobbeW/Data_Statistiek_R/main/bronnen/student_exam_scores.csv",
na.strings = c(".", "NA", ""),
strip.white = TRUE,
stringsAsFactors = FALSE
)
# Scores herberekenen op 20
data$exam_score <- round(data$exam_score / max(data$exam_score) * 20, 1)
# Alleen gewenste kolommen:
data <- data[c("student_id","hours_studied","sleep_hours","attendance_percent","exam_score")]
# Beantwoord hieronder de vragen
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