Ketidakpastian Pengukuran
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Definisi
Parameter yang terkait dengan hasil pengukuran yang mencirikan dispersi nilai yang dapat diatribusikan secara wajar kepada besaran yang diukur, dinyatakan sebagai ketidakpastian standar atau ketidakpastian diperluas.
Penjelasan
A mass measurement of 100.35 g with an expanded uncertainty of ±0.05 g (coverage factor k=2, 95% confidence) means the true mass lies between 100.30 g and 100.40 g with 95% probability. Uncertainty has two components: Type A (statistical analysis of repeated readings) and Type B (from calibration certificates, specifications, and physical reasoning). GUM (Guide to the Expression of Uncertainty in Measurement) is the international standard for uncertainty calculation.
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RELATED TERMS
Faktor Konversi
Pengali numerik yang digunakan untuk mengubah suatu besaran dari satu satuan ke satuan lain.
Presisi
Tingkat ketelitian suatu pengukuran, ditunjukkan oleh jumlah angka signifikan.
Akurasi
Seberapa dekat suatu pengukuran dengan nilai sebenarnya dari besaran yang diukur.
Analisis Dimensional
Metode konversi satuan dengan mengalikan faktor konversi yang bernilai 1.
Mil Laut
Satuan jarak yang digunakan dalam navigasi laut dan udara, sama dengan 1.852 meter.