avg min max awk

report.awk

BEGIN { min = 10000000000000; max = 0 }

{ 
  sum += $1; 
  if ($1 < min) { min = $1 }; 
  if ($1 > max) { max = $1 };  
} 

END { 
  print min, "\t", sum / NR, "\t", max;
}