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Vekten til en pakke salt (kg) fra fabrikken Saltspesialisten kan oppfattes som en normalfordelt stokastisk variabel. Ved produksjonen en dag veies 10 pakker. Mlingene antas

Vekten til en pakke salt (kg) fra fabrikken Saltspesialisten kan oppfattes som en normalfordelt stokastisk variabel. Ved produksjonen en dag veies 10 pakker. Mlingene antas vre uavhengige og normalfordelte med forventning ? og varians ?2.

Resultatene ble: xj (kg): 1,2890,8981,0851,2211,3060,7111,1531,2210,8131,17

?j=110xj=10,867?j=110(xj?x)2=0,3880981

a)

Estimer ? og ?2.

?^=

Round your answer to 3 decimal places.

og ?2^=

Round your answer to 3 decimal places.

b)

Anta at ?=0,17. Finn et 99% konfidensintervall for ?.

[

Round your answer to 3 decimal places.

,

Round your answer to 3 decimal places.

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Look picture for better wiev on question its google transalate

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