35. Esteban compró una camioneta que le costó $100,000. A los dos años el valor de su camioneta decayó en un 25%; 1
otros dos años después su valor decayó en To respecto al precio devaluado y, cuando Esteban quiso venderla, solo le
pagaron el 80% de ese último valor. ¿Cuánto le pagaron a Esteban por su camioneta?

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.