SOLUTION: The class average on a statistics test is 70 marks with a standard deviation of 12 marks. What minimum mark must a student obtain to be in the top 8% of the class? For full marks

Question 878775: The class average on a statistics test is 70 marks with a standard deviation of 12 marks. What minimum mark must a student obtain to be in the top 8% of the class?
For full marks your answer should be accurate to at least one decimal place.
The Top 8.0% Minimum Mark =

Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

 

Hi



mean = 70, SD = 12

z = invNorm(.92) = 1.4051



Note:  z = 1.4051 = (X-70)/12

1.4051*12 + 70 = X 

RELATED QUESTIONS

The class average on a statistics test is 65 marks with a standard deviation of 12 marks.  (answered by rothauserc)
`I'm having a hard time understanding how to compute this question. I'm just starting my... (answered by ewatrrr)
in a certain statistics class, the marks obtained by students on a class test followed a... (answered by stanbon)
The class average on a test is 85% with a standard deviation of 3%.  Assuming that the... (answered by stanbon)
 in a certain statistics class, the marks obtained by students on a class test followed a  (answered by Boreal)
An analysis of the final test scores for a selection test revealed that they approximate... (answered by Boreal)
In a certain stats class, the marks obtained by students on a class test followed a... (answered by CPhill)
The average mark on a math exam was 70% with a standard deviation of 2.5%. Kane scored... (answered by Boreal)
On an examination the average grade was 74 and the standard deviation was 7. If 12% of... (answered by Theo)