The average (arithmetic mean) of a normal distribution of a school's test scores is 65, and standard deviation of the distribution is 6.5. A student scoring a 70 on the exam is in what percentile of the school?
Choices	Answers:
A) 63rd percentile
B) 68th percentile
C) 84th percentile
D) 96th percentile
E) 98th percentile
(78-65)/6.5= 
<gadget id="calculator">(78-65)/6.5</gadget>
<output>2</output>
2 sigmas or 95.5th percentile for +-2 sigma but in our case we need only upper tail, so it's 100 - (100 - 95.5)/2= 63th percentile   63rd percentile
<result>A</result>
The average (arithmetic mean) of a normal distribution of a school's test scores is 65, and standard deviation of the distribution is 6.5. A student scoring a 70 on the exam is in what percentile of the school?
Choices