If a sample of data has mean of 23 and SD of 3, which of the following values is more than 2.5 SDs from the mean?  Options
A) a. 16
B) b. 13.5
C) c. 17
D) d. 23.5
E) e. 26.5
Value ismore than 2.5SDfrom the mean means that the distance between the mean and the value must be more than 2.5SD=7.5. So the value either &lt; 23-7.5= 
<gadget id="calculator"> 23-7.5</gadget>
<output>15.5</output>
15.5 or &gt;23+7.5=30.5.   Answer: b. 13.5.
<result>B</result>
If a sample of data has mean of 23 and SD of 3, which of the following values is more than 2.5 SDs from the mean?