Number of Birds
Alana and Eva are sisters.Let X denote the number of birds that Alana may have in the next two years,and let Y denote the number of birds Eva may have during the same period.The marginal probability distributions of X and Y are shown below. 
-{Number of Birds Narrative} Verify that E(XY)= E(X)E(Y).Did you expect this result? Why?
Definitions:
Cell-Mediated Immunity
A type of immunity that does not involve antibodies but involves the activation of phagocytes, antigen-specific cytotoxic T-lymphocytes, and the release of various cytokines in response to an antigen.
Antibody-Mediated Immunity
A form of immunity that involves the production of antibodies by B cells to neutralize pathogens.
Cytotoxic T Cell
A type of immune cell that kills cancer cells, cells that are infected with viruses (or other pathogens), or cells that are damaged in other ways.
Cytokines
Small proteins released by cells that have a specific effect on the interactions and communications between cells, often playing a pivotal role in immune responses.
Q4: Which of the following describes selection bias?<br>A)
Q62: An auto insurance company evaluates many numerical
Q72: The Student t distribution looks similar in
Q102: If P(B)= .7 and P(B|A)= .4,then P(A
Q106: If two events are independent,what is the
Q123: What happens to the shape,mean,and variance of
Q137: If P(B)= .7 and P(A|B)= .7,then P(A
Q156: If the random variable X is
Q185: If X has an exponential distribution
Q195: If the mean of an exponential