STAT35I Section D Quiz8 NamcM / 1-G~ Be1111erf The National Sleep Foundation used a survey to determine whether hours of sleep per night are independent of age (Newsweek, January I9, 2004). A sample of individuals was asked to indicate the number of

ST AT3 51 Sec ti on D Qui z7 Name /Vl ~h Be11 11eft I. Actual sales of a company (in millions of dollars) for January through April are shown below. Month Sales Exp. Smoothing Forecast Error (Error) 2 Forecast (a= .~) I Janua 18 Febru ary 25 ~er 7 L-