數學與統計 大學 2年以上以前

有哪位大神可以寫過程給我嗎🙏🙏

Let P(X = x) = 1-3 1-3 , 13₁ x = 74 1 , x = 5 3 x = 8 (1) Obtain μ, o² (**)< (2) Obtain the sampling distribution of X for sample size 34 (3) Obtain E(X), Var (X). Does E(X) = µ? Does Var (X) = ²? Show your n answers.(數字要算出來)

數學與統計 大學 4年以上以前

求救抽樣調查不知道這怎麼寫🙏

The picture is USA map. There are four area, containing N=51 states. The government wants to investigate death rate (death/confirmed) by covid-19 in USA. Asample of n=8 states is selected- How to design and carry outa sample survey for each ofthe following designs. a. Simple random sampling b. Stratified sampling c. Systematicl sampling d. Cluster sampling with stratified sampling In addition, to discuss and comparetheir population mean and bound onthe errorofestimation.