BEGIN{
freq[1]=1049
freq[2]=1182
freq[3]=1182
freq[4]=1464
freq[5]=1467
freq[6]=1467
freq[7]=2930
freq[8]=3006
freq[9]=3006
i=1
}

{
ch3f[i]=$1
i++
}

END{
for(i=1;i<10;i++){
	sum = sum + (freq[i] - ch3f[i])**2
  }
printf("%3.1f \n", sqrt(sum/9))
}