| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Outline of Final Research Achievements |
There are some statistical estimation problems for which no procedures of fixed sample size are available. For these problems, we can solve them by means of sequential sampling methods where the sizes of sample are random variables. In this research, we investigated asymptotic properties of two-stage procedures in which the samples are taken twice. When the lower bound for the variance is known, we inserted the known lower bound into the two-stage procedure and researched its asymptotic efficiency. For the problem of constructing fixed-width confidence interval, we established higher-order asymptotic theory on the rate of convergence of the coverage probability to the confidence level 1 minus alpha as the width tends to zero.
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