Re: [計量] 幾題計量機經

看板GRE (GRE入學考試)作者CCWck (幹嘛要暱稱)時間17年前 (2008/07/22 20:41)推噓0(0推 0噓 0→)

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※ 引述《clay ()》之銘言： : 這些題目來自最近的korea機經 : 1. Given a series k, k-1, k+3, k+1, k+2. Find the ratio of mean and standard : deviation? : A. k+1 : B. k : C. 1 : D. 1/k : E. 1/(k+1) : => 這題怎麼算都覺得mean是k+1 standard deviation是2^1/2 : 選項找不到答案算跟你一樣 : 2. 53 students are divided into P and Q groups. P has 7 batches of n : students each. Q has x students of 5 batches or 6 batches with x students in ^^^^^ x-1?? : 5 batches and x+1 students in 6th batch : Col A: x : Col B: n : =>這題題目看不懂分成P Q兩組 P組又可以分成7個小組每組n人 Q組可以分成5個有x人的小組也可以分成有5個x個人的小組加上一個x+1人的第六組算出來 P組應該是28人 Q組應該是25人 n=4 x=5 : 3. Given two line equations x - 2y = -1 and 3x - 4y = 3 and these are the : two lines of y-intercept : and asked to find out the point between these two lines? : A. (1, 0) : B. (0, -1) : C. (0, 0) : D. (2, -1) : E. (2, 1) : =>這題覺得C E都是答案因為帶入二個方程式會變號 : 4. A Number 'N' is a positive 3 digit number. If ‘x’ is in its hundredth : place and 'y' is its units place then the number (N - 100x - y) is divisible : by which of the following number? : A. 2 : B. 8 : C. 108 : D. 9 : E. 5 : =>這題覺得A E都是答案因為N-100X-Y= x0 個位數為0可被2 5整除不知道為啥有 : 二個答案 : 5. If 8 consecutive positive integers are taken and each integer is divided : by 8, then : Col A: The average of the remainders of 8 consecutive integers when divided : by 8 : Col B: 3.5 : =>這題A是(0+1+2+3+4+5+6+7)/8 = 3.5嗎? -- -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.113.13.127