Consider this scenario: surgery patients in hospital a and hospital b are classified as being in either good condition or poor c
ondition. when looking separately at survival rates among patients in good condition and in poor condition, hospital b has higher rates for both groups. yet when the two groups are combined, hospital a has a higher rate. what's the most likely lurking variable?
A microwave oven is not a computer by itself, though it has a computer built-in to aid its task of microwaving. This is called an embedded computer, and the functionality is hard-coded to make it cheaper to build.
