statistics: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/lib/cmtk/bin/statistics - from package: cmtk

You may install the required package with command apt-get install {package}

Error in other languages:
statistics: bevel nie gevind nie
statistics: comandă negăsită
statistics: comando não encontrado
statistics: commande introuvable
statistics: command not found
statistics: käsku ei ole
statistics: không tìm thấy lệnh
statistics: komanda nerasta
statistics: Kommando nicht gefunden.
statistics: kommandot finns inte
statistics: komut yok
statistics: nie znaleziono polecenia
statistics: níor aimsíodh an t-ordú
statistics: no se encontró la orden
statistics: no s'ha trobat l'ordre
statistics: opdracht niet gevonden
statistics: parancs nem található
statistics: perintah tidak ditemukan
statistics: príkaz nenájdený
statistics: příkaz nenalezen
statistics: команда не найдена
statistics: командата не е открита
statistics: 命令找不到
statistics: コマンドが見つかりません