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Suppose I wanted to know something about how much teachers are paid. I think there may be differences in pay by gender and by school level (elementary, middle, high school). I select random samples of 30 male and 30 female teachers at each of these three school levels.
a. What are my dependent and independent variables?
Memory Cells
A type of immune cell that remains in the body long term after an infection has been defeated, enabling a faster and stronger response upon re-exposure to the same pathogen.
IgM Antibodies
The first type of antibody the body makes when it fights a new infection, providing an initial line of defense against pathogens.
Cytotoxic T Cells
A type of immune cell that kills cancer cells, cells that are infected (particularly with viruses), or cells that are damaged in other ways.
IgA
Immunoglobulin A, an antibody variety, is pivotal in the immune activity of mucosal linings.
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