https://www.hindawi.com/journals/scientifica/2012/949164/

1 A). Is this an observational study or an experiment?

1 B). What are the variables being measured?

1 C). Explain why this variable has nearly normal data.

1 D). Draw a labeled picture of the normal distribution showing where the approximate middle 68, 95, and 99.7 percent of the data is.

1 E). Explain in the context of the variable what the middle 68% of the distribution expresses.

O O Histogram 60 Mean = 66.25 Standard deviation = 15.926 N = 624 50 40 Frequency 30 O O 20 10 20 40 60 80 100 120 BSA-related left renal volume (mL/m ) - Normal