for a certain exam,a score of 58 was 2 standard deviations below the mean and a score of 98 was 3 standard deviations above the mean .what was the mean score for the exam

a exam for/about for certain reason还是for a certain reason for a certain exam,a score of 58 was 2 standard deviations below the mean and a score of 98 was 3 standard deviations above the mean .what was the mean score for the exam for a certain exam,a score of 58 was 2 standard deviations below the mean and a score of 98 was 3 standard deviations above the mean .what was the mean score for the exam a certain i'm __you can pass the exam A.sure B.certain请详细说明理由 we have reached a certain respect for each other Your experience of entering for a certain kind of competition . are you certain ____ the facts? A about B for it is_____ that i can't pass the English exam _____your help A certain、withB sure without C certain without D sure with just missed a certain date certain a certain什么意思 in a certain way act in a certain in a certain sense offers you a chance to live with a new family for a certain time Won't it be better for me to ask you for help on a certain problem? 英语翻译A prepurpchase exam may not necessaryly be guarantee of future soundness.but the exam is actually a glimpse into the horse’s physiological state during a certain moment in time.