std dev造句

例句与造句

1. What about calculating the std dev of a random sample of the population ?-- LarryMac 16 : 43, 7 March 2006 ( UTC)
2. Say I have a lognormal variable with mean 0.000325 and std dev 0.00900802 and I want to find the 99.5th percentile.
3. It's difficult to find std dev in a sentence. 用std dev造句挺难的