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路面の体感乗り心地評価試験における信頼区間を利用した被験者数設定の視点と方法 A DETERMINATION METHOD OF NUMBERS OF SUBJECTS FOR PAVEMENT RIDE QUALITY RATINGS BASED ON THE STATISTICAL CONFIDENCE INTERVAL 富山, 和也 川村, 彰 Kawamura, Akira 川村 Kawamura 彰 Akira 石田, 樹 高橋, 清 Takahashi, Kiyoshi 高橋 Takahashi 清 Kiyoshi open access c 2010 公益社団法人　土木学会 ride quality roughness numbers of subjects statistical confidence interval driving simulator This study shows the method of determining the numbers of subjects (sample size) for pavement ride quality ratings based on the statistical confidence interval. The sample size calculation using the confidence interval depends on the estimated statistic of unbiased variance (UV). In this study, a driving simulator experiment was conducted to estimate the UV for the pavement ride quality ratings. According to the experimental results, we developed a figure for the sample size determination based on the width of 95% confidence interval. In the practical perspective on the pavement management activities, subjective experiments of ride quality evaluation need to keep the precision of ±0.5 ratings (95% confidence interval = 1) with a sample size of twenty members. 公益社団法人　土木学会 2010-12 jpn journal article VoR https://kitami-it.repo.nii.ac.jp/records/8127 土木学会舗装工学論文集 15 65 71 https://kitami-it.repo.nii.ac.jp/record/8127/files/2010_路面の体感乗り心地評価試験における信頼区間を利用した被験者数設定の視点と方法.pdf application/pdf 1.4 MB 2016-11-22