If a certain sample of data has a mean of 25.0 and a standard deviation of 3.0, which of the following values is more than 2.5 standard deviations from the mean?
Choose the correct choice from the following options.
A) 12.0 B) 13.5 C) 17.0 D) 23.5 E) 26.5
Value ismore than 2.5SDfrom the mean means that the distance between the mean and the value must be more than 2.5*SD=7.5. So the value must be either less than 25-7.5=17.5.5or more than 25+7.5=32.5.   Answer: 17.0.
<result>C</result>
If a certain sample of data has a mean of 25.0 and a standard deviation of 3.0, which of the following values is more than 2.5 standard deviations from the mean?