上机操作练习三after topic12作业

1、学生上机操作练习三(After topic 12)1. S.260-S.8.12. S329-S.10.25 (a) (b)3已知 19811998 年我汽车产量数据如下表。分别计算三年移动平均和指数平滑趋势值(平滑系数为 0.4)4. 某工厂各季节产品的销售情况如下表所示（万元）yearspringsummerautumnwer2000184396339141200121243841015619811998 年我国汽车产量数据年份产量(万辆)年份产量(万辆)19811982198319841985198619871988198917.5619.6323.9831.6443.7236.9847

2、.1864.4758.3519901991199219931994199519961997199851.4071.42106.67129.85136.69145.27147.52158.25163.00试求各季的季节指数，并2005 年各季销售量5某化工企业为研究温度与催化剂对某种化工产品得率(产出与投入比)的影响，在其他条件不变的情况下，选择了 4 种温度 3 种催化剂进行组合试验，结果如下。请问：(1) 温度对产品得率是否有显著影响(=0.05)(2) 催化剂对产品得率是否有显著影响(=0.05)(3) 温度和催化剂不同组合的搭配对产品得率是否有显著影响(=0.05)对上述三个检验给出 p

3、 值和结论.6A Sydney-based company producakes, which it sells to stores both New South Wales. The company hasa line of wrapped he city and country recorded these sales December 1998 andelow. The companyfor each of the 12 quarters betnSeptember 2001, as shownhe tab温度催化剂B1B2B3A1(60 度)666168737570A2(70 度)85

4、8196985361A3(80 度)949781795966A4(90 度)857981769488200222650946718420032555235101852004269566509212is keen to produce a mcake sales for eacht will enable it to predict itsing quarter.1). After the seasonal effects have been removedarch 2000 of the time series isthe value(a) 3570(b) 4152(c) 3561(d) 34

5、842). Exponential-smoothing value in June 2001 of number ofcakes sold is (resistant coefficient 0.90)(a) 44563). The 12(b) 3026(c) 2846(d) 4130quarters of data were labelled (1,2,.,12) andcalled the x-variable. The y-variable was number of cakessold. Least squares linear regreswas used to find theeq

6、uation of the trend line of y. The trend value in December2001 of y is(a) 4123(b) 4701(c) 5012(d) 64587 Considerthefollowingsetofpaireddataforthevariables x and yy352037244241401719213951442823576033quarternumber of cakes soldDecember 19981874March 19992142June 19992605September 19992767December 199

7、92924March 20003270June 20004020September 20004764December 20004137March 20014016June 20013886September 200137701） the correlation coefficient of X and Y is(a) 0.75(b) -0.91(c) -0.86(d) 0.782） the least-squares regres(a) Y=71.05-2.34*X(c) Y=65.36+1.36*Xline of X and Y is (b) Y=63.92-1.20*X(d) Y=80.21-0.85*X、3）the adjusted coefficient of determination for the line is(a) 0.83(b) 0.77(c) 0.69value of y is(d) 0.944）when x is 36 the regres(a) 16(b) 19(c) 21(d) 258比较 3 种化肥(A、B 两种新型化肥和传统化肥)在三种类型(酸性、中性和碱性)的土地上对作物的产量情况有无差别，将每块土地分成 6 块小区，施用 A、B两种新型化肥和传统化肥。收割后，测量各组作物的产量如下表。化肥、土地类型及其它们的交互作用对作物产量有影响吗？(