Maria is analyzing three variables: two categorical independ…

Maria is analyzing three variables: two categorical independent variables and one interval-scaled dependent variable. She wants to examine both the individual and interaction effects of the independent variables on the outcome. What is the most appropriate statistical method for this analysis?

A 6-year-old child presents with a history of recurrent ear,…

A 6-year-old child presents with a history of recurrent ear, sinus, and lower respiratory tract infections over the past year. As the pediatric APRN begins the initial workup, which laboratory test is the most appropriate first step to evaluate for an underlying immunodeficiency?