Statistik opgave U39.pdf - a Middelværdi variansen og standardsafvigelse for danske og udenlandske studerende Udregninger er foretaget i Excel

Statistik opgave U39.pdf - a Middelværdi variansen og...

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a) Middelværdi, variansen og standardsafvigelse for danske og udenlandske studerende Udregninger er foretaget i Excel Gennemsnit Spredning Varians 17408,6 1252,882596 1569714,8 4040,6 144,5866522 20905,3 c) Kovariansen og korrelationen mellem det årlige antal danske og udenlandske studerende Cov Cor 111848,8 0,617437141 Udregnet i Excel
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D) Gør rede for intuitionen bag fortegnet på korrelationen beregnet i delspg. c). Fortegnet viser at der er ingen korrelation
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a.
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20% fraktilerne fortæller at 20% af værdierne er mindre eller lig med den pågældende værdi.
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Unformatted text preview: 20% af antallet af solgte flødeboller ligger således under 16,15 90% fraktilerne fortæller at 90% af værdierne er mindre eller lig med den pågældende værdi, mens 10% er større. Således er 90% af den gns. salgspris under 19,5 b. 38-5: a b: Korrelationen er minus, hvilket indikerer at der er ingen korrelation mellem værdierne. Dette passer til grafen, hvor de to tidsseriegrafer bevæger sig i forskellige retninger....
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