有冇人可以教下我statistics 由零開始

知道
我都覺冇乜機會再用

好佩服所有數學叻既人

想問下 揾critical value 即係搵咩

絲打你prob distribution要學到幾深?係咪純粹鳩計幾個common distribution嘅variance呀mean呀咁?

A study is to be carried out that requires 90% confidence of estimating the proportion of students who study over 3 hours per day to within ±0.065
. How large the sample size of students should be for such estimation?

The critical value is (?) (correct to 4 decimal)

呢條好易 但我唔識 有冇人識

應該係

我YR1 SEM1學過
好容易上手 唔識既話睇多幾條example就識 題目關鍵字間低哂佢就咁sub數

P(Study Time > 3) = p

Two-tail 90% confidence interval = (p-0.065, p+0.065)

Critical Value (Excel) =NORM.S.INV((1-90%)/2) = 1.6448

條題目是咪唔完整？

完全唔知佢想我搵乜

可以教你 tg: A2345abc

咁就易啦,仲以為你係要人手in個cdf呀variance呀mean依d

巴打搵唔到你tg

真係易咩

得幾個common distribution就背咗佢搞掂啦

我講緊d mean呀variance依d

哦哦，咁後面個啲點算呀

有乜要學呀?

啫..

Binomial好攞命呀 冇腦既真係攞0分

Level 0（無數底直觀入門）: Elementary Statistics - Allan G. Bluman

(Level 0.5: Calculus + Linear Algebra 程度同AL差唔多)

Level 1 （基礎數底）: Probability and Statistical Inference - Hogg
入面幾多數 無數底好難讀

Level 2（迴歸分析）: Applied Linear Regression - Weisberg

Level 3 (Markov Chain)

(Level 3.5: Math Analysis)

Level 4 （前沿統計學 - Machine Learning, Bayesian Inference）

網上有唔少學stat資源 e.g. Khan academy, Jbstatistics (youtube)

感謝巴打個推介

binomial係講得2個可能性,例如擲銀仔,一係公一係字,每次擲銀仔都係independent event
如果n係擲嘅次數,p係每次擲到公嘅probi
mean number of 公=np
variance=np(1-p)

你每個distribution都係記依2樣就得,proof就唔好理

當然就要識計probability啦,所以有d pmf都要知

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