ecide whether or not the conditions and assumptions for inference with a t-test are satisfied. Explain your answer. A group of researchers want to determine the mean annual household income for families receiving services at a large community center. They randomly select ten families and record the following household incomes: $23,050, $23,340, $23,450, 23,630, $23,890, $24,250, $24,340, $24,390, $24,660.