2021年7月23日 星期五

108年專科學力鑑定-初級統計詳解

教育部108年自學進修專科學校學力鑑定考試

專業科目(一): 初級統計


解答:調(C)

解答:(D)

解答:8595Q314(A)

解答:調xy(C)

解答:=(xiˉx)2n1=X2(X)2/nn1=92.6(30)2/109=2.69=0.5374(D)

解答:{=5/65=1/13=7/98=1/14>(A)

解答:5:90,120,140,145,160{5/4=1.25Q1=2=1205×3/4=3.75Q3=4=145Q3Q1=145120=25(B)
解答:>>(A)

解答:(A):{P(A)=0.6P(B)=0.4P(BA)=0.3=P(AB)P(A)=P(AB)0.6P(AB)=0.18(B):P(ABc)=P(A)P(AB)=0.60.18=0.42(C):P(AB)=P(AB)P(B)=0.180.4=0.45(D)×:P(AB)=P(A)+P(B)P(AB)=0.6+0.40.18=0.820.72(D)

解答:50%×30%50%×30%+30%×20%+20%×10%=1515+6+2=1523=0.652(D)

解答:V(W)=V(3X+5Y)=32V(X)+52V(Y)=9×4+25×4=136(D)

解答:f(x)=1f(1)+f(2)+f(3)+f(4)=4c+3c+2c+c=1c=1/10{EX=xf(x)=4c+6c+6c+4c=20c=2EX2=x2f(x)=4c+12c+18c+16c=50c=5V(X)=EX2(EX)2=522=1(A)

解答:10000×0.1500=500(B)

解答:XB(10,0.03)Var(X)=np(1p)=10×0.03×0.97=0.291(C)

解答:1192=C51C41C92=59=0.5556(D)

解答::18+18=14:114=3414×34=316=0.1875(B)

解答:XPP(X=k)=eλλkk!,λ=2=01P(k=0)+P(k=1)=eλ+λeλ=3e2=3×0.1353=0.4059(D)

解答:(A)×:XP(X=C)(B)×:P(X=C)(C)×:11(D):XP(XC)=P(X<C)(D)

解答:P(X<320)=P(Z<32040080)=P(Z<1)=P(Z>1)=P(Z>0)P(0<Z<1)=0.5P(0<Z<1)=0.50.3413=0.1587(B)

解答:P(0<Z<1.64)=0.4495P(Z<1.64)=0.5+0.4495=0.9495P(Z>1.64)0.05X25030=1.64X=299.2(C)

解答:0.5(D)

解答:{f(x)dx=110a+bxdx=[ax+12bx2]|10=a+12b=1xf(x)dx=1/210x(a+bx)dx=[12ax2+13bx3]|10=12a+13b=12{2a+b=23a+2b=3{a=1b=0(C)

解答:XN(60,102)16YN(60×16,102×16)=N(960,1600)K滿P(Y>K)=1%P(Z>K9601600)=1%K96040=2.326K=1053.04(B)(C)

解答:{XN(5,32)YN(10,42)YXN(105,32+42)=N(5,52)P(YX>3)=P(Z>355)=P(Z>1.6)=P(1.6<Z<0)+0.5=P(0<Z<1.6)+0.5=0.4452+0.5=0.9452(C)

解答:(C)

解答:n(zα/2)2σ2E2=(z0.025)255021502=1.96211232=51.65n=52(C)

解答:P(0<Z<1.64)=0.4495P(Z<1.64)=0.5+0.4495=0.9495P(Z>1.64)=0.05=2zα/2p(1p)n=2z0.05(180/300)(120/300)300=2×1.64×0.0283=0.09277(C)0.6460.553=0.093(C)

解答:{P(0<Z<1.64)=0.4495P(0<Z<1.65)=0.4505P(0<Z<1.64+1.652=1.645)=0.95n(zα/2)2×p(1p)E2=1.6452×0.4×0.60.052=259.78n=260(A)

解答:(A)

解答:(D)

解答:14(B)(D)H0H0(D)

解答:P(X<5)=P(Z<54.90.5/25)=P(Z<1)P(0<Z<1)=0.3413PP(Z>1)=0.50.3413=0.1587(A)

解答:(A)×:(C)×:(D)×:(B)

解答:T(C)

解答:P<αH0(B)

解答:9.884.215=3157=1.659(B)

解答:ˉx1ˉx2s21n1+s22n2=87831210+1010=42.2=2.697(B)

解答:(A)

解答:(df)(SS)(MS)FdfB26.13MSBdfW11.6MSWTotal14{dfB=31=2dfW=14dfB=142=12{MSB=26.13/dfB=26.13/2MSW=11.6/dfW=11.6/12F=MSB/MSW=26.132×1211.6=13.515(D)

解答:{k=4n=4+5+3+5=17α=0.05{dfB=41=3dfW=174=13FdfB,dfW,α=F3,13,0.05(A)

解答:136832400228515300317624200829719001829×49=368.4471×49=31.564002829×39=276.3371×39=23.673003829×29=184.2271×29=15.7820082971900χ2=(368.44368)2368.44+(31.5632)231.56+(276.33285)2276.33+(23.6715)223.67+(184.22176)2184.22+(15.7824)215.78=0.442368.44+0.44231.56+8.672276.33+8.67223.67+8.222184.22+8.22215.788.10.442×2+8.672×2+8.222×2285.86(D)

解答:{ˉx=(2+4+1+5+3)÷5=3ˉy=(15+25+10+40+30)÷5=24(ˉx,ˉy)=(3,24)X=3Y=24(C)

解答:(B)

解答:(A)×:=SSR/SST(B)×:(D)×:SSE=SSTSSRSSESSRSST1(C)

解答:{MSE=10n=50SSE=MSE×(nk)=10×(502)=480SSR=SSTSSE=2000480=1520R2=SSR/SST=1520/2000=0.76(B)


解答:4020040200=0.2(D)

解答:P(=)==40100=0.4(B)

解答:{P()=90200P()=12P()=40200P()×P()=90200×12=45200P()=40200(B)

解答:X=250Z=25012564=1.95P(0Z<1.95)=0.4744X=250=0.5+0.4744=0.97440.9744×4500=4384.845004384.8=115.2(C)

解答:5004500=19=0.111110.1111=0.8889k滿P(Z<k)=0.8889P(0Z1.22)=0.3888P(Z1.22)=0.5+0.3888=0.8888k=1.22z1.22X12564=1.22X=203.08204(A)
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