<prompt> The standard normal distribution :Is skewed to the leftHas mean1.0Has standard detion0.0Has variance1.0  <response>: The standard detion in a standard normal curve is 1.0. The variance SD2 is thus also one. Ref: Parks Textbook Of Preventive And Social Medicine By K. Park, 19th Edition, Page 702; Parks Textbook Of Preventive And Social Medicine By K. Park, 18th Edition, Page 647; Methods in Biostatistics: For Medical Students and Research Workers By BK Mahajan, 6th Edition, Page 68 