///|
fn main {
  let result = @metrics.proportion_test(120, 1000, 150, 1000)
  println("p_value=" + result.p_value.to_string())
  println(
    "confidence_interval=[" +
    result.confidence_interval_low.to_string() +
    "," +
    result.confidence_interval_high.to_string() +
    "]",
  )
}