嗨,爱思考的PZer你好:
我们在哪学的以下计算?400k是已知条件吗,为什么要用middle of the confidene interval
是已知条件,题干中涉及这个计算的内容就是下面两句话,这个计算其实是“看图说话”
Verdue estimates AMLAIC annual operating expenses to be $1.8 million.
V同学预估A年度支出总额是1.8M
The ESU Office of Sponsored Research estimates a 90% confidence interval for the mean value of annual research grant funds from outside sources to be $0.4 to $1.4 million.
ESU 研究办公室估计,来自外部来源的年度研究资助资金的平均值为 0.4 至 140 万美元( 90% 的置信区间)。
0.4m就是400k
解答中AMLAIC’s total funding requirement of $1,800,000 is reduced by external funds, with expected value at the middle of the confidence interva这句话的意思就是
估计的0.4到140万美元取一个中间值,就是($1,400,000 + $400,000) / 2 作为estimate
至于 confidence interval就是指0.4到140的这个区间
----------------------------------------------虽然现在很辛苦,但努力过的感觉真的很好,加油!