嗨,爱思考的PZer你好:
mock现在都是Boston协会出的,不收费了,题目质量真的很差,这道题也就是解答中说了一下取中间值,题干根本没有提,我个人认为是出题人想这么出,但是题干又忘记说清楚了。
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!