Suppose that pH of a certain chemical compound has mean of 5

Suppose that pH of a certain chemical compound has mean of 5.00 with standard deviation 0.2. A large batch of the compound is subdivided and a sample given to each student in a morning lab and each student in an afternoon lab. Let X the average pH as determined by the morning students and Y the average pH as determined by the afternoon students. If pH is a normal variable and there are 25 students in each lab, compute p(-0.1 SE X - Y SE 0.1). 0.0566 0.9232 0.0471 0.9660

Solution