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La distancia entre San Jose, California y Jacksonville, Florida, es 2350 millas.
En cierto mapa esto está representado por una longitud de 12 pulgadas.
Oakland, California y Mesa, Arizona, están separados por 660 millas. Halla la
longitud de la línea que conecta estas dos ciudades en el mapa.

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.