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1、市場(chǎng)預(yù)測(cè)與決策預(yù)測(cè)下期電視產(chǎn)量班級(jí):姓名:學(xué)號(hào):、某企業(yè)的電視產(chǎn)量預(yù)測(cè),現(xiàn)擁有最近連續(xù)20個(gè)刀的資料如下表所示:?jiǎn)挝唬ㄈf臺(tái))口回岡二、根據(jù)資料數(shù)據(jù),繪制序列圖形:■Series:PRODUCTIOMTorkfile:U1TITLEDViqwFrocs
2、Objects
3、FrintName
4、Freeze
5、Samp"GenrSheetStats
6、IdentLine
7、BPRODUCTION從圖中看這個(gè)企業(yè)近20個(gè)月的產(chǎn)量并不存在明顯趨勢(shì),也沒有明顯的季節(jié)趨勢(shì)。因此,從直觀上判斷可以采用一次指數(shù)平滑法對(duì)企業(yè)下個(gè)月的產(chǎn)量進(jìn)行預(yù)測(cè)。三、擴(kuò)大樣本期一個(gè)月:更改
8、樣本期1?21月到2004年9月:PRODUCTIONTorkflie:UHTITEED口回岡View]ProcvIObJects
9、Print
10、NameFreeze
11、Edi2/—
12、ILabel+/rI*ide+-IInsDelITitie
13、SampleIGervr
14、PRODUCTIONLastupdated:06/08/11-21:07I2003:0118990002003:022000.0002003:0320200002003:0417800002003:051985.0002003:0620110002003:072103.0002003
15、:0819020002003:091895.0002003:1020340002003:1119740002003:1218600002004:0120140002004:0219000002004:0319990002004:0417980002004:0520140002004:061835.0002004:0719870002004:082041.0002004:09NA<
16、
17、—L>I四、進(jìn)行指數(shù)平滑操作:(1)、Alpha設(shè)定0.3時(shí)■Series:PRODUCTIONVorkfile:UHTITLED□回區(qū))View
18、ProcsObj
19、ects
20、Print
21、NameFreeze
22、Edit+/"
23、Smpl+/-Label+/"Wide+-InsDelTitleSample
24、Genr
25、Date:06/08/11Time:21:12Sample:2003:012004:08Includedobsen/ations:20Method:Holt-WintersNoSeasonalOriginalSeries:PRODUCTIONForecastSeries:PRODUCSMParameters:Alpha0.3000Beta0.0000SumofSquaredResiduals2023
26、257RootMeanSquaredError100.5797EndofPeriodLevels:Mean1982.954Trend7.500000(2)、Alpha設(shè)定0.5時(shí):■iSeries:PRODUCTIONlorkfile:UHTITLED□回區(qū)ViewProcsObjects
27、PrintName
28、Freeze
29、SampleGenrSheet
30、Sta/ts11dentLin?Bar
31、Date:06/08/11Time:21:28Sample:2003:012004:08Includedobservations:20Method:Ho
32、lt-WintersNoSeasonalOriginalSeries:PRODUCTIONForecastSeries:PRODUCSMParameters:Alpha0.5000Beta0.0000SumofSquaredResiduals234800.1RootMeanSquaredError108.3513EndofPeriodLevels:Mean1997.630Trend7.500000Alpha為0.3的預(yù)測(cè)殘差平方和100.5797Alpha為0.5的預(yù)測(cè)殘差平方和108.3513所以選擇平滑系數(shù)為0?3的預(yù)測(cè)結(jié)果:1983萬臺(tái)。