<prompt> If the distribution of intra ocular pressure IOP seen in 100 glaucoma patients has an average 30 mm with a SD of 10, what is the lower limit of the average28263225  <response>: In the given question, Meanu30 mm and SD1.0 mm Thus,95 values are contained in the range of Mean-2 SD or 30-21 So, 95 values are contained in the range 30-2 mm and 302 mm OR between 28 and 30 mm. Reference: Simple Biostatistics by Indeayan Indrayan,1st edition,pg no:117 and Methods in Biostatistics by Mahajan,7 th edition,pg no:73, Park 23rd ed, pg no.849. p 