central_measures <- function(df, x_var, group_var) {
x_var <- enquo(x_var)
group_var <- enquo(group_var)
df %>%
group_by(!! group_var) %>%
summarize(med = median(!! x_var, na.rm = T),
avg = mean(!! x_var, na.rm = T)) %>%
ungroup()
}
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