A Medical Researcher Is Interested in Whether Patients' Left Arms

Multiple Choice

A medical researcher is interested in whether patients' left arms or right arms are longer. If 9 patients participate in this study (so that 9 left arms and 9 right arms are measured) , how many degrees of freedom
Should the researcher use in her t-test critical value?

A) 8
B) 9
C) 16
D) 17