If a certain sample of data has a mean of 30.0 and a standard deviation of 2.0, which of the following pairs contain two values that are each at least 2.5 standard deviations from the mean? Pick one:
A) (14.0; 16.5)
B) (14.5; 21.0)
C) (14.0; 26.5)
D) (16.5; 26.0)
E) (21.0; 36.5)
2.5 standard deviation equals to 2.5*2= 
<gadget id="calculator">2.5*2</gadget>
<output>5</output>
5;   2.5 standard deviations from the mean, so5 points, from the mean is the range from {mean-5} to {mean+5}, so from 25 to 35:   The correct answer choice must cover all this range: only answer choice E does this.   Answer: (21.0; 36.5).
<result>E</result>
If a certain sample of data has a mean of 30.0 and a standard deviation of 2.0, which of the following pairs contain two values that are each at least 2.5 standard deviations from the mean?