Monday, November 30, 2009

Rancangan Acak Lengkap (RAL) dengan ulangan tidak sama

Oke, kali ini saya akan menjelaskan tentang rancangan acak lengkap (RAL) dengan ulangan yang tidak sama. Sebelumnya saya mohon maaf karena baru sekarang bisa menulis artikel ini berhubung kesibukan saya yang sangat padat. Artikel ini saya tulis karena banyaknya permintaan dan komentar untuk membahas tentang rancangan acak lengkap (RAL) dengan ulangan tidak sama.
Seperti pada penggunaan RAL pada artikel sebelumnya, sebenarnya rancangan ini tidak berbeda dalam hal penggunaannya dengan RAL biasa dimana rancangan ini akan tepat apabila bahan percobaan dan kondisi percobaan anda bersifat HOMOGEN. Juga apabila jumlah perlakuan anda terbatas.

Prosedur pengacakan dan tata letak rancangan tidak berbeda dengan RAL ulangan sama, yang membedakan hanyalah jumlah ulangan yang tidak sama untuk setiap perlakuan. Untuk itu saya tidak membahas lebih lanjut bagaimana tata cata pengacakan dan tata letaknya disini dan anda dapat mempelajarinya disini.

Untuk lebih jelasnya akan saya ilustrasikan satu contoh hasil data pengamatan dari suatu percobaan berikut ini :


Analisis Ragam dalam RAL dengan ulangan yang tidak sama adalah sebagai berikut :
Rumus-rumus perhitungannya :
a) Menghitung Jumlah Kuadrat :




Selengkapnya silahkan DOWNLOAD DI SINI

59 comments:

  1. pak
    saya punya permasalahn
    kalau kasusnya seperti ini
    penggunaan kentang dari satu lahan untuk pembuatan chips itu rancangannya RAK atau RAL ??
    makasih ya Pak

    ReplyDelete
  2. To Naynienay
    Thanks ea untuk kunjungannya ke blog saya yang sederhana ini. Bisa dijelaskan sedikit bagaimana bentuk perlakuannya, keadaan tempat percobaannya dan kalau bisa apa tujuan percobaannya.

    ReplyDelete
  3. haha.. bapak punya akun moodle?
    dengan itu menagajar online akan lebih gampang

    ReplyDelete
  4. To : Dipa Utomo
    Thanks atas kunjungannya. pengen sih mencoba moodle. Tapi saya tak banyak waktu untuk itu. mungkin nanti akan saya coba. sayapun masih mempelajarinya.

    ReplyDelete
  5. assalamu'alaikum.sy mers terbantu skali dg artikel ini krn sy kbtulan laporan pkl sy mnggunkan RAL dg ulangan yg tdk sm namun yg sy bingungkan adlh utuk analisis variansinya menggunakan GLM(general linear model),dptkh pak memuat artikel yang mmbhs ANOVA dg GLM tsbt?terima kasih dan mohon mf sebelumnya.

    ReplyDelete
  6. To: Ummu asyiah.
    Thanks ea udah mampir di blog yg sederhana ini.
    analisis ragam dengan GLM !. maksudnya GLM itu seperti apa?. Maaf saya kurang faham maksudnya.

    ReplyDelete
  7. thanks pak sblumnya,sy jg msih bingung apa tu GLM,tp skilas sy thu bhw analisis ragam kan menggunkan bbrapa metode diantrnya anlisis rgam dg 1 arah, 2 arah,dan slah stunya dg model linier umum(GLM),sy ditugskn ma dosen sya utk pengerjaan laporan sy dg analisis tsbt tapi sy msh bingung skali dg analisis tsbt.o ya pak data sy tu terkait ttg gerak individu / motilitas semen segar pejantan sapi dg satuan (%),apkh data tsbt cocok jk di analisis dg RAL ulangan tidak sama?trus anova nya dg GLM ?.

    ReplyDelete
  8. to: Ummu.
    Untuk menentukan rancangan apakah yg cocok digunakan, saya sebenarnya harus melihat perlakuan dan tujuan percobaan Ummu secara keseluruhan. Dan untuk GLM, saya belum begitu mendalami karena sangat jarang digunakan untuk penelitian di bidang pertanian yg saya lakukan. Tapi Ummu bisa mempelajarinya di http://akstk29.multiply.com/journal/item/10

    ReplyDelete
  9. pak, bapak sudah berpengalaman sepertinya mengajar berbasis ICT/IP, apa bapak tidak ingin mengajar online via video streaming? SEAMEO SEAMOLEC sedang mengembangkan basis ini secara perlahan ke kota2... pemkot malang dan semarang juga fix, sekedar info saja pak.

    ReplyDelete
  10. To Dipa Utomo.
    Thaks atas infonya Mo. Tapi kayanya di tempat saya di Palangka raya belum ke arah sana. Dan diperguruan tinggi tempat saya ngajar juga belum mendukung. Padahal bagus juga tuh, bisa ngajar secara online.

    ReplyDelete
  11. Terima kasih sebelumnya pak, saya sedang menganalisis hasil penelitian saya yg menggunakan RAL ini. Hasilnya menunjukkan bahwa tidak ada perbedaan nyata baik pada taraf 1% maupun 5%. Lalu bagaimana pak pembahasannya pak?

    ReplyDelete
  12. To Rizal Sasuke.
    Kalau dari hasil anova tdak berpengaruh nyata, berarti perlakuan yg kita coba itu mempunyai pengaruh yg sama terhadap peubah yg kita ukur.

    ReplyDelete
  13. mengapa rancangan ini d sebut rancangan acak lengkap (RAL)

    ReplyDelete
  14. To Vianozen:
    Mengapa disebut Rancangan Acak Lengkap, karena kita melakukan pengacakannya secara lengkap. Hal ini dikarenakan lingkungan percobaan kita homogen. Berbeda dengan Rancangan Acak Kelompok (RAK) dimana kita melakukan pengacakan secara per kelompok, tidak secara keseluruhan.

    ReplyDelete
  15. terima kasih atas informasinya gan,,
    cara-cara yang agan berikan, sangat bermanfaat bagi para pembaca,
    semoga tetap sukses gan
    by:
    http://jeparaantiquefurniture.com/
    http://kotamebel.com/

    ReplyDelete
  16. To: jeparaantiquefurniture.com
    Sama-sama gan, semoga bisa bermanfaat untuk kita semua.

    ReplyDelete
  17. pak gmna ea cara menentukan ulangn itu,,saya masih bnggung.....

    ReplyDelete
  18. To Anonim.
    Kalau untuk RAL, cara menentukan jumlah ulangan itu memakai rumus t(n-1) lebih dari samadengan 15. Sedangkan kalau untuk RAK, memakai rumus (t-1)(n-1) lebih dari samadengan 15.

    ReplyDelete
  19. berbagi ilmu itu sangat indah
    karena ilmu tidak akan putus amalnya jika bermanfaat untuk sesama

    ReplyDelete
  20. Aamiin...
    Semoga bisa bermanfaat bagi semua...

    ReplyDelete
  21. Pak, mau tanya...jika dalam percobaan karena hewan percobaan mati atau tidak tumbuh APAKAH analisisnya dilakukan dengan 'data hilang' atau RAL ulangan tidak sama...terima kasih.

    ReplyDelete
  22. assalamualaikum, pak bagaimana menentukan jumlah ulangan dengan 3 perlakuan dalam penelitian? kalo ulangannya 5 sudah memenuhi syarat atau belum untuk di uji RAL dengan ANOVA 5% pak?

    ReplyDelete
  23. pak, bagaimana bila RAL ulangan tidak sama, tetapi 2 faktor perlakuan? bagaimana cara menghitung JK nya?

    ReplyDelete
  24. pak gimana cara mengetahui rumus ulangan dan cara pencariannya, agar kita mengetahui berapa x ulangan.
    saya menggunakan 3 perlakuan tapi saya tidak tau berapah x ulangannya, tolong pencerahannya.....?

    ReplyDelete
    Replies
    1. Kalau Rancangan Lingkungan yang digunakan RAL maka rumus utk mencari jumlah ulangan adalah t(r - 1) lebih dari atau sama dengan 15. Jika Rancangan lingkungan yang digunakan RAK maka gunakan rumus (t - 1)(r - 1) lebih dari atau sama dengan 15.

      t = jumlah perlakuan
      r = jumlah ulangan

      Delete
  25. Assalamu'alaikum.. Maaf pak, saya menggunakan RAL. Tapi apakah boleh tidak menggunakan rumus mencari jumlah ulangan t(n-1)=15? Saya menggunakan 4 perlakuan, dan ingin menggunakan 3 ulangan saja mengingat biaya penelitian yg ckup mahal. Seorang dosen pernah berkata, dalam kasus sperti ini boleh saja asal jumlah ulangan dan jumlah perlakuan berbentuk persegi panjang, nah tentang teori rancangan berbentuk persegi panjang ini adakah teorinya pak? Terimakasih sebelumnya,

    ReplyDelete
  26. Iya pak, penelitian saya termasuk penelitian kimia terkait Uji Antioksidan dan biayanya ckup mahal. Tapi adakah teori tentang rancangan berbentuk persegi panjang sehingga saya tidak apa2 jk tdk menggunakan rumus itu? Jika ada, tolong bantuan bapak, terimakasih.

    ReplyDelete
    Replies
    1. Mungkin maksud dosen itu Rancangan Bujur sangkar latin ya. Kalau rancangan ini ada teorinya. Saya kurang faham maksud rancangan berbentuk "persegi panjang" ini.

      Delete
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