@article{oai:kitami-it.repo.nii.ac.jp:00008127,
 author = {富山, 和也 and 川村, 彰 and 石田, 樹 and 高橋, 清},
 journal = {土木学会舗装工学論文集},
 month = {Dec},
 note = {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.},
 pages = {65--71},
 title = {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},
 volume = {15},
 year = {2010}
}