...: Medicine Your medical research team is investigating the mean cost of a 30-day supply of a certain heart medication. A pharmaceutical company...
... century mathematicians discovered powerful ways to investigate the shapes of complicated objects. The basic idea...
以下用獨立性檢定 : H0 : 獨立 H1 : 不獨立 df = (列數-1)(行數-1) = (2-1)(3-1) = 1*2 = 2 臨界值 = χ^2 0.05(2) = 5.99 (查卡方分配表) 列出觀察值o , 再分別計算行列總合,結果如下表: 圖片參考:http://imgcld.yimg.com/8/n/AC09299269/o/20131210142547.jpg 再計算理論值eij = 第i列總合 * 第j...
題目的大意是有個研究,研究中有239位罹患肺癌的人以及429位未罹患肺癌的人。調查發現一個危險因子,就是罹患肺癌者有98人有飼養小鳥,未罹患肺癌者有101人飼養小鳥。 第一個問題是要將此結果用2*2的表格表示,其中飼養鳥的狀況為列,有無肺癌為行。第二個問題是要計算odds...
1.----------Inescapable Shock--Escapable Shock--No Shock...sum Reject----8------------------19---------------18---------45 No Reject-22---------------- 11---------------15---------48 Sum-------30-----------------30---------------33...
The break-even point is the number of units for which R = C R is the total revenue from selling x units. C is the total cost of producing x units. R = x*p p(x) = -4x + 42.5 R = x( -4x + 42.5...
1. "T" * (100+"x")=100*36+"x"*60 => "T" = (100*36+"x"*60)/ (100+"x") = [60 (100+"x") - 6000 + 3600] / (100+"x") = [60 (100+"x") - 2400] / (100+"x") = [60 (100+"x") / (100+"x")] - [2400 / (100+"x")] = 60 - 2400 *[1/ (100+"x...
( )1. Which of the following statement is correct? (A)Since F = 344.04, there is no evidence to infer that the model is valid (B)Since p-value = 0, there is enough evidence to infer that the model is valid (p值=0,顯著) (C...