mean, median, sd

mean, median, sd

mean() computes the arithmetic average, median() finds the middle value, and sd() computes the standard deviation of a numeric vector. All three are fundamental descriptive statistics used to summarize a dataset's central tendency and spread. Each has an na.rm = TRUE argument to ignore missing values when computing the result.

Note: If a vector contains NA, mean() returns NA by default -- pass na.rm = TRUE to ignore missing values.

Example: mean, median, sd

scores <- c(85, 90, 78, 92, 88)

cat("Mean:", mean(scores), "\n")
cat("Median:", median(scores), "\n")
cat("Std Dev:", sd(scores), "\n")