According to the U.S. Census Bureau, the average (mean) household income for all households in the United States in 2014 was $53,657. Toni gathers a random sample of 145 U.S. household incomes and finds an average household income of $60,251. A simulated distribuion of sample statistics is shown below. Mean=53870.176 SD =407.487 Num samples=1000 52000 52800 53800 54400 55200 Sample means (a) The simulated distribution of sample statistics is centered at O TT = 53, 657 OTT = 60, 251 Ou = 53, 657 Ou = 60, 251 (b) The observed statistic is Ox = 53, 657 Op = 60, 251 Ox = 60, 251 Op = 60, 251(c) In this distribution of sample statistics, the statistic we observed is O usual/expected in the distribution. 0 unusual/unexpected in the distribution