100% Statistics 2 Assignment 8 Chapter 11 The National Sleep Foundation surveyed 250 representative adults in each of various countries to ask questions about their sleeping habits. A portion of the results are given in the following table. Standard Total sleep deviation Country (minutes) (minutes) USA 391 40 Mexico 426 30 Canada 423 35 England 409 42 Is there sufficient evidence that the average amount of sleep in the US is different from the average amount of sleep in Mexico? X1=426, s1=40, n1=250 X2=391, $2=30, n2=250 U1-u2>0 The mean number of minutes adults in the united states get less sleep than Mexico. Is there sufficient evidence that the average amount of sleep in Canada is different from the average amount of sleep in England? Yes there is sufficient evidence 2 99+)