[問題] 徵考題答案

[globekiller (搶錢念研究所)]

  1.To investigat which factors are important for effect. Which
    tool can be used ?
    a.Pareto dagram  b.ANOVA  c.t distribution  d.Regression analysis
    (1)b+d (2)a+b (3)b+d (4)a+c (5)a+b+d (6)none of above

  2.A single replicate of 2^2 factorial design has 4 reatments.Since
    the time limitation, the 4 treatments should be performed by two
    operators. Which experimentaldesign is appropriate ?
    (1)RBD (2)factorial design (3)fractional factorial design
    (4)confounding design

  3.To test if two independent population means are same, which
    statistic can be used ?
    a. Mann-Whitney statistic  b.paired t statistic
    c.Z statistic  d.Wilcoxon signed rank
    (1)a (2)b (3)c (4)a+c (5)c+d (6)b+c (7)none of above

  4.To test if a coin is fair, which statistic can be used ?
    a.Z statistic  b.Chi-square statistic  c.t statistic  d.F statistic
    (1)a (2)b (3)c (4)d (5)a+b (6)a+c (7)b+d

  5.To investigate the effect of a new drug, which statistic can be used?
    a.Z statistic  b.paired t statistic  c.F statistic in ANOVA (CRD)
    d.F statistic in ANOVA (RBD)
    (1)a (2)b (3)c (4)d (5)a+d (6)b+d (7)a+c (8)b+c

  6.About the F statistic, which one is incorrect ?
    (1)used in ANOVA (2)inference for (變異數2/變異數1)
    (3)t^2(v) = F(v,1) (4)F(1-a)(v1,v2) = 1/F(a)(v2,va)

  7.A uniform distibution with pdf f(x)=1/(b-a),a<x<b.
    The expectation E(X)= ?
    (1)(b-a)/2 (2)1/2 (3)(b^2-a^2)/12 (4)(a+b)/2


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