加油啊
頂 我stuck咗喺sigma同s嘅分別嗰到
Population vs sample?
我一路以為"sample standard deviation"=s=sigma x bar
但睇睇吓又唔係..
係咪即係 sample SD=求其抽n個出嚟嘅SD=s
Sigma x bar=sampling distribution of sampling mean 嘅SD?
學左unbiased estimator 呢個概念未
Supposedly yes..
But I skipped a lot of stuff and I'm getting those back........
利申：純自學咁濟
我覺得statistics好難清concept。我個M1 stat底都未清
（我認我垃圾）嚟緊summer讀stat
我DSE take M2
其實有好多時間畀我讀翻m1啲嘢但我懶
