Tugas 3 Pengantar Komputasi Modern ( Softskill)

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TEKNIK PENGOLAHAN DATA


1.   Pengertian Data
     Data adalah catatan atas kumpulan fakta. Data merupakan bentuk jamak dari datum, berasal dari bahasa latin yang berarti “sesuatu yang diberikan”. Dalam penggunaan sehari-hari data berarti suatu pernyataan yang diterima secara apa adanya. Pernyataan ini adalah hasil pengukuran atau pengamatan suatu variabel yang bentuknya dapat berupa angka, kata-kata, atau citra.
Dalam keilmuan (ilmiah), fakta dikumpulkan untuk menjadi data. Data kemudian diolah sehingga dapat diutarakan secara jelas dan tepat sehingga dapat dimengerti oleh orang lain yang tidak langsung mengalaminya sendiri, hal ini dinamakan deskripsi. Pemilahan banyak data sesuai dengan persamaan atau perbedaan yang terkandung dinamakan klasifikasi.
Dalam pokok bahasan manajemen pengetahuan data dicirikan sebagai sesuatu yang bersifat mentah dan tidak memiliki konteks. Dia sekedar ada dan tidak memiliki signifikansi makna di luar keberadaannya itu. Dia bisa muncul dalam berbagai bentuk, terlepas dari apakah dia bisa dimanfaatkan atau tidak.
Menurut berbagai sumber lain, data dapat juga didefinisikan sebagai berikut:
·           Menurut kamus bahasa inggris-indonesia, data berasal dari kata datum yang berarti fakta
·           Dari sudut pandang bisnis, data bisnis adalah deskripsi organisasi tentang sesuatu (resources) dan kejadian (transactions)yang terjadi
·           Pengertian yang lain menyebutkan bahwa data adalah deskripsi dari suatu kejadian yang kita hadapi
Intinya data itu adalah suatu fakta-fakta tertentu sehingga menghasilkan suatu kesimpulan dalam menarik suatu keputusan

2.    Pengertian Pengolahan Data
Pengolahan data merupakan bagian yang amat penting dalam metode ilmiah, karena dengan pengolahan data, data tersebut dapat diberi arti dan makna yang berguna dalam memecahkan masalah penelitian. Data mentah yang telah dikumpulkan perlu dipecah-pecahkan dalam kelompok-kelompok, diadakan kategorisasi, dilakukan manipulasi serta diperas sedemikian rupa sehingga data tersebut mempunyai makna untuk menjawab masalah dan bermanfaat untuk menguji hipotesa atau pertanyaan penelitian.
Mengadakan manipulasi terhadap data mentah berarti mengubah data mentah tersebut dari bentuk awalnya menjadi suatu bentuk yang dapat dengan mudah memperlihatkan hubungan-hubungan antara fenomena. Beberapa tingkatan kegiatan perlu dilakukan, antara lain memeriksa data mentah, sekali lagi, membuatnya dalam bentuk tabel yang berguna, baik secara manual ataupun dengan menggunakan komputer.
Setelah data disusun dalam kelompok-kelompok serta hubungan-hubungan yang terjadi dianalisa, perlu pula dibuat penafsiran-penafsiran terhadap hubungan antara fenomena yang terjadi dan membandingkannya dengan fenomena-fenomena lain di luar penelitian tersebut. Berdasarkan pengolahan data tersebut, perlu dianalisis dan dilakukan penarikan kesimpulan hasil penelitian.
Pengolahan data secara sederhana diartikan sebagai proses mengartikan data-data lapangan sesuai dengan tujuan, rancangan, dan sifat penelitian. Misalnya dalam rancangan penelitian kuantitatif, maka angka-angka yang diperoleh melalui alat pengumpul data tersebut harus diolah secara kuantitatif, baik melalui pengolahan statistik inferensial maupun statistik deskriptif. Lain halnya dalam rancangan penelitian kualitatif, maka pengolahan data menggunakan teknik non statitistik, mengingat data-data lapangan diperoleh dalam bentuk narasi atau kata-kata, bukan angka-angka. Mengingat data lapangan disajikan dalam bentuk narasi kata-kata, maka pengolahan datanya tidak bisa dikuantifikasikan. Perbedaan ini harus dipahami oleh peneliti atau siapapun yang melakukan penelitian, sehingga penyajian data dan analisis kesimpulan penelitian relevan dengan sifat atau jenis data dan prosedur pengolahan data yang akan digunakan. Di atas dikatakan bahwa pengolahan data diartikan sebagai proses mengartikan data lapangan, yang berarti supaya data lapangan yang diperoleh melalui alat pengumpul data dapat dimaknai, baik secara kuantitatif maupun kualitatif, sehingga proses penarikan kesimpulan penelitian dapat dilaksanakan. Dengan demikian, pengolahan data tersebut dalam kaitannya dengan praktek pendidikan adalah sebagai upaya untuk memaknai data atau fakta menjadi makna.
Makna penelitian yang diperoleh dalam pengolahan data, tidak sampai menjawab pada analisis “kemengapaan” tentang makna-makna yang diperoleh. Misalnya dalam rancanganpenelitian kuantitatif, maka angka-angka yang diperoleh melalui alat pengumpul data tersebut harus diolah secara kuantitatif, baik melalui pengolahan statistik inferensial maupun statistik deskriptif.

3.    Jenis data

Data menurut jenisnya ada dua yaitu data kualitatif dan data kuantitatif sebagai berikut:
a. Data kualitatif

Data yang berhubungan dengan kategorisasi, karakteristik berwujud pertanyaan atau berupa kata-kata. Contonya wanita itu cantik, pria itu tampan, baik, buruk, rumah itu besar dan sebagainya. Data ini biasanya didapat dari wawancara yang bersifat subyektif sebab data tersebut ditapsirkan lain oleh orang yang berbeda. Data kualitatif dapat diangkakan dalam bentuk ordinal atau rangking.

b. Data kuantitatif


Data yang berwujud angka-angka. Contohnya ; yang diterima menjadi PNS 150 orang, penghasilan klinik bersalin 1 milyar/ bulan. Data ini diperoleh dari pengukuran langsung maupun dari angka-angka yang diperoleh dengan mengubah data kualitatif menjadi data kuantitatif. Data kuantitatif bersifat objektif dan bisa ditafsirkan oleh semua orang.

 

4.    Langkah-langkah pengolahan data

a. Penyusunan data

Data yang sudah ada perlu dikumpulkan semua agar mudah untuk mengecek apakah semua data yang dibutuhkan sudah terekap semua. Kegiatan ini dimaksudkan untuk menguji hipotesis penelitian. Penyusunan data harus dipilih data yang ada hubungannya dengan penelitian, dan benar-benar otentik. Adapun data yang diambil melalui wawancara harus dipisahkan antara pendapat responden dan pendapat interviwer.


b. Klasifikasi data

Klasifikasi data merupakan usaha menggolongkan, mengelompokkan, dan memilah data berdasarkan pada klasifikasi tertentu yang telah dibuat dan ditentukan oleh peneliti. Keuntungan klasifikasi data ini adalah untuk memudahkan pengujian hipotesis.


c. Pengolahan data

Pengolahan data dilakukan untuk menguji hipotesis yang telah dirumuskan. Hipotesis yang akan diuji harus berkaitan dan berhubungan dengan permasalahan yang akan diajukan. Semua jenis penelitian tidak harus berhipotesis akan tetapi semua jenis penelitian wajib merumuskan masalahnya, sedangkan penelitian yang menggunakan hipotesis adalah metode eksperimen. Jenis data akan menentukan apakah peneliti akan menggunakan teknik kualitatif atau kuantitatif. Data kualitatif diolah dengan menggunakan teknik statistika baik statistika non parametrik maupun statistika parametrik. Statistika non parametrik tidak menguji parameter populasi akan tetapi yang diuji adalah distribusi yang menggunakan asumsi bahwa data yang akan dianalisis tidak terikat dengan adanya distribusi normal atau tidak harus berdistribusi normal dan data yang banyak digunakan untuk statistika non parametrik adalah data nominal atau data ordinal.

d. Interpretasi hasil pengolahan data

Tahap ini menerangkan setelah peneliti menyelesaikan analisis datanya dengan cermat. Kemudian langkah selanjutnya peneliti menginterpretasikan hasil analisis akhirnya peneliti menarik suatu kesimpulan yang berisikan intisari dari seluruh rangkaian kegiatan penelitian dan membuat rekomendasinya. Menginterpretasikan hasil analisis perlu diperhatikan hal-hal antara lain: interpretasi tidak melenceng dari hasil analisis, interpretasi harus masih dalam batas kerangka penelitian, dan secara etis peneliti rela mengemukakan kesulitan dan hambatan-hambatan sewaktu dalam penelitian.

5.    Pengolahan Data Penelitian Secara Kualitatif dan Kuantitatif
 
a. Pengolahan Data Kualitatif
Pengolahan data kualitatif dalam penelitian akan melalui tiga kegiatan analisis yakni sebagai berikut.
1) Reduksi Data
Reduksi data dapat diartikan sebagai suatu proses pemilihan data, pemusatan perhatian pada penyederhanaan data, pengabstrakan data, dan transformasi data kasar yang muncul dari catatan-catatan tertulis di lapangan. Dalam kegiatan reduksi data dilakukan pemilahan-pemilahan tentang: bagian data yang perlu diberi kode, bagian data yang harus dibuang, dan pola yang harus dilakukan peringkasan. Jadi dalam kegiatan reduksi data dilakukan: penajaman data, penggolongan data, pengarahan data, pembuangan data yang tidak perlu, pengorganisasian data untuk bahan menarik kesimpulan. Kegiatan reduksi data ini dapat dilakukan melalui: seleksi data yang ketat, pembuatan ringkasan, dan menggolongkan data menjadi suatu pola yang lebih luas dan mudah dipahami.

2) Penyajian Data
Penyajian data dapat dijadikan sebagai kumpulan informasi yang tersusun sehingga memberikan kemungkinan adanya penarikan kesimpulan dan pengambilan tindakan. Penyajian yang sering digunakan adalah dalam bentuk naratif, bentuk matriks, grafik, dan bagan.

3) Menarik Kesimpulan/Verifikasi
Sejak langkah awal dalam pengumpulan data, peneliti sudah mulai mencari arti tentang segala hal yang telah dicatat atau disusun menjadi suatu konfigurasi tertentu. Pengolahan data kualitatif tidak akan menarik kesimpulan secara tergesa-gesa, tetapi secara bertahap dengan tetap memperhatikan perkembangan perolehan data.


b. Pengolahan Data Kuantitatif
1) Mengelompokkan Data
Ada dua jenis data, yaitu data kualitatif dan data kuantitatif. Data kualitatif tidak memerlukan perhitungan matematis. Sebaliknya, data kuantitatif memerlukan adanya perhitungan secara matematis. Oleh sebab itu, data kuantitatif perlu diolah dan dianalisis antara lain dengan statistik. Untuk mengolah dan menganalisis data, ada dua macam statistik, yaitu statistik deskriptif dan statistik inferensial. Statistik deskriptif digunakan untuk mendeskripsikan variabel penelitian melalui pengukuran. Statistik inferensial digunakan untuk menguji hipotesis dan membuat generalisasi.

2) Kegiatan Awal dalam Mengelompokkan Data
Agar data dapat dikelompokkan secara baik, perlu dilakukan kegiatan awal sebagai berikut.
(a) Editing, yaitu proses memeriksa data yang sudah terkumpul, meliputi kelengkapan isian, keterbacaan tulisan, kejelasan jawaban, relevansi jawaban, keseragaman satuan data yang digunakan, dan sebagainya.
(b) Coding, yaitu kegiatan memberikan kode pada setiap data yang terkumpul di setiap instrumen penelitian. Kegiatan ini bertujuan untuk memudahkan dalam penganalisisan dan penafsiran data.
(c) Tabulating, yaitu memasukkan data yang sudah dikelompokkan ke dalam tabel-tabel agar mudah dipahami.

3) Pengolahan Statistik Sederhana
 
Pengolahan statistik adalah cara mengolah data kuantitatif sehingga data mempunyai arti. Biasanya pengolahan data dilakukan dengan beberapa macam teknik, misalnya distribusi frekuensi (sebaran frekuensi) dan ukuran memusat (mean, median, modus).

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