所屬科目: 研究所、轉學考(插大)◆機率統計
(a) Find the C.D.F.’s of Y. (5 %)
(b) Find the p.d.f. of Y. (5 %)
(c) Calculate the E(Y). (5 %)
2. To show . (10 %)
(a) Calculate the E(X). (5 %)
(b) Calculate the E(Y). (5 %)
(a) Calculate the probability P(U<5). (5 %)
(b) Calculate the E(U|W). (5 %)
(c) Calculate the E(U). (5 %)
(a) What is the null and alternative hypothesis of the appropriate test? (5 %)
(b) A sample of ten diabetic women is selected; their mean diastolic blood pressureis =84 mm Hg. Using this information, conduct a two-sided test at the =0.05level of significance. What is the p-value of the test? (5 %)
(c) What conclusion do you draw from the results of the test? (5 %)
2. 嘉義大學農場生產的雞蛋的寬度分布情況如下:請問此數據是否支持下列假說:雞蛋的寬度大致呈常態分布為 N(16.5, 1)? (10 %)
3. 一新醫學療法宣稱,其在延長癌症末期病人的壽命方面,較傳統療法更具效果。根據醫學期刊紀錄,在傳統療法下,病人平均延長 4.2 年的壽命,而根據對 80 位病人接受新療法所得到的結果,其樣本平均值與標準差分別為 4.5 年和 1.1 年。在顯著水準=0.05 下,檢定這個宣稱是否正確?(10 %)
(a) Find the normal equations. (5 %)
(b) Prove that the matrices H and are symmetric, idempotent. (5 %)
(c) Prove that H is orthogonal to (5 %)