For each variable presented, state whether you would expect a histogram of the data to be bell-shaped,

Question:

For each variable presented, state whether you would expect a histogram of the data to be bell-shaped, uniform, skewed left, or skewed right. Justify your reasoning.
(a) Annual household incomes in the United States
(b) Scores on a standardized exam such as the SAT
(c) Number of people living in a household
(d) Ages of patients diagnosed with Alzheimer’s disease