Suppose a botanist grows many individually potted eggplants, all treated identically and arranged in groups of four pots on the greenhouse bench. after 30 days of growth, she measures the total leaf area x of each plant. assume that the population distribution of x is approximately normal with mean = 800 and sd = 90. which of the following is a true statement about the sampling distribution for the average of each group of four plants? mean = 800 and sd = 90 mean = 800 and sd = 90/4 mean = 800 and sd = 90/2 mean = 800/4 and sd = 90/4