A web-based survey of US family physicians, general internists, and cardiologists was done to examine awareness of tools available to calculate CHD risk and frequency of using CHD risk assessment to guide recommendations of aspirin, lipid-lowering, and blood pressure lowering therapies for primary prevention. The table below reports the years in practice by specialty.

Years in Practice	Family Physicians	General Internists	Cardiologists	Total
>19	40%	70%	88%	639
10 to 19	26%	20%	8%	186
<10	34%	10%	4%	175
Total	390	300	310	1000

1. You are considering using the chi-square test to test for an association between years in practice and type of physician. What is the smallest expected cell count?