GENERAL INSTRUCTION. Answer the following problems and show your complete solution including the formula used in the problem. MAGIC is strictly prohibited! 8. A camera has been developed to detect the presence of cataract more accurately. Using this camera, the gay level of each point (or pixel) in the lens of a human eye can be characterized into 256 gradations, where a gray level of 1 represents black and a gay level of 256 represents white. Photographs were taken of 6 randomly selected normal eyes and 6 randomly selected cataractous eyes. Patient No. l 2 3 4 5 6 Cataractous median gray level 161 140 13 5 171 106 149 Normal median gray level 158 181 185 145 167 1?? Construct a 99% condence interval for the mean difference in median gay levels between cataractous and normal eyes