For a certain exam,a score of 58 was 2 standard deviations below mean and a score of 98 was 3 standard deviations above mean.What was the standard deviation for the exam? Options.
A) 7  B) 6  C) 8  D) 0  E) 2
Mean-2SD=58   Mean+3SD=98   By solving above equation we get,   SD (absolute value)=8   Ans. 8
<result>C</result>
For a certain exam,a score of 58 was 2 standard deviations below mean and a score of 98 was 3 standard deviations above mean.What was the standard deviation for the exam?