大白菜

QUOTE:

以下是引用waterline在2009-11-23 9:33:00的发言：

1) Reliability factor refers to Notes LOS10 f, e)

Confidence Interval=Point Estimate +/- (reliability facor x standard error)

 

2) Given 230,000 to 480,000, 99% Confidence Interval (same as above), to get SD

-> Point estimate=(480,000-230,000)/2+230,000=355,000, 99% CI->reliability factor around 3

-> SD=(480,000-355,000)/3=41,667

 

3)

MAD - LOS 7f)

sum of diviations = 0 -> arithmetic average of the deviations = 0,  not 1

 

 

 

真厉害