A sport's team athletic trainer is researching variables that impact recovery of players who underwent surgery to repair a typical lower body injury.

• Type of procedure (reconstructive, replacement, repair, ect. )
• Hours per week spent in physical therapy
• Hours of sleep per night
• Diet (highprotein or high carb)
• Number of days before the player returns to playing

A) Which variables could we construct a one proportion z-interval for:

B) State a research question that could be addressed by using a one mean t-test

C) State a research question that could be addressed by using a one proportion z-test:

D) State an additional variable for which data could be collected by theathletic trainer, and classify it as categorical or numerical.

pls explain, thank you so muchhh.