
plz hjelp meg her

Moderators: Vektormannen, espen180, Aleks855, Solar Plexsus, Gustav, Nebuchadnezzar, Janhaa
Janhaa wrote:a)
[tex]\hat \mu\,=\, \overline x\,=\, \frac {1}{N} \sum_{i=1}^N x_i[/tex]
[tex]\hat \sigma\,=\,sqrt{ \frac{1}{N} \sum_{i=1}^N (x_i\,-\,\overline x)^2}[/tex]
b)
[tex]KI_{0.95}:\,\,\,\overline x\,\pm\,1,96 \cdot \hat \sigma [/tex]
Et 95% konfidensintervall inneholder den sanne verdien [tex]\;( \hat \mu ) \;[/tex] med en sannsynlighet på 0,95.
Husk at [tex]\;\;\hat \mu = 1132,155[/tex]kalleja wrote:Janhaa wrote:a)
[tex]\hat \sigma\,=\,sqrt{ \frac{1}{N} \sum_{i=1}^N (x_i\,-\,\overline x)^2}[/tex]
er ikke formelen gitt ved [tex]\hat \sigma\,=\,sqrt{\frac{\hat\mu(1-\hat\mu)}{N}[/tex]