Interleukin-10 (IL-10) is a protein that is expressed by several types of cells in the immune system and helps to regulate inflammation and immune responses to infections.

Suppose that we want to know whether exposure to a certain chemical alters IL-10 expression.Blood samples were collected from 12 mice.Then each mouse was exposed to the chemical, and a second blood sample was collected.IL-10 levels were measured for each blood sample in pg/mL (picograms/milliliter), and then the change in expression from before-exposure to after-exposure was calculated for each mouse.This difference is our response variable.

State the null and alternative hypotheses for this study usingbothnarrative statements and the corresponding equations.Remember to define any symbols that you use.