SOLUTION: 5 CHEVROLETS ARE CRASH TESTED TO FIND OUT THEIR MEAN REPAIR COST. IT WAS FOUND THAT THE MEAN REPAIR COST OF THIS SMALL SAMPLE WAS $1706 WITH AN S.D OF $830. cONSTRUCT A 90% CONFIDE

Algebra ->  Probability-and-statistics -> SOLUTION: 5 CHEVROLETS ARE CRASH TESTED TO FIND OUT THEIR MEAN REPAIR COST. IT WAS FOUND THAT THE MEAN REPAIR COST OF THIS SMALL SAMPLE WAS $1706 WITH AN S.D OF $830. cONSTRUCT A 90% CONFIDE      Log On


   

Question 172541This question is from textbook Elementary Statistics
: 5 CHEVROLETS ARE CRASH TESTED TO FIND OUT THEIR MEAN REPAIR COST. IT WAS FOUND THAT THE MEAN REPAIR COST OF THIS SMALL SAMPLE WAS $1706 WITH AN S.D OF $830. cONSTRUCT A 90% CONFIDENCE INTERVAL FOR THE MEAN REPAIR COST IN ALL SUCH VEHICLE COLLISIONS. This question is from textbook Elementary Statistics

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
5 CHEVROLETS ARE CRASH TESTED TO FIND OUT THEIR MEAN REPAIR COST. IT WAS FOUND THAT THE MEAN REPAIR COST OF THIS SMALL SAMPLE WAS $1706 WITH AN S.D OF $830. cONSTRUCT A 90% CONFIDENCE INTERVAL FOR THE MEAN REPAIR COST IN ALL SUCH VEHICLE COLLISIONS.
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x-bar = 1706
E = t(10% for a 2-tailed test with df=4)[830/sqrt(5)]
= 1.533[371.19] = 569.03
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90% CI: 1706-569.03 < u < 1706+569.03
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Cheers,
Stan H.