Seven-year-old Jane feels severe apprehension about attending school. She often gets dizzy or nauseous and complains of stomachaches. Jane's real fear is most likely

Why are sampling distributions preferred relative to sample distributions?

A. Less is better B. Sample distributions are better C. More is better D. Sample distributions approximate populations

Sperm are produced in the

a. cells of Leydig b. seminiferous tubules c. spermatic cord d. all of the above