Time series, cross-correlation, and ACF plots for series A and series B are below.  How much is the approximate lag between the two processes? 

Which of the following is NOT true of bone marrow transplants? 

Type ___ hypersensitivity reactions are also called delayed-type hypersensitivity.

Food allergies cause reactions only in the stomach.

The ADF test output for an observed time series appears below. Based on this output, is it likely that differencing once (a first-difference) would be useful?  Or, would differencing twice likely be more helpful?  Explain.

Answer the following question regarding immunodeficiencies: Explain why women who show no disease symptoms themselves can pass on inheritable immunodeficiencies their sons, yet their daughters tend to be unaffected

Consider the following Ljung-Box test output: What does this test indicate about the residual process?  Explain.

The ADF test output for an observed time series appears below. Choose the best answer.

Which immunoglobulin is used for the elimination of helminths?

Which of the following organisms evades the immune system by producing different pili?