Probability & Stats - Normal Distribution

label Statistics
account_circle Unassigned
schedule 1 Day
account_balance_wallet $5

The scores on a particular test are normally distributed with mean of 73 and standard deviation 5.  What score would a student need to be among the top 10% of all test scores?

Mar 2nd, 2015


The scores on a particular test are normally distributed with mean of 73 and standard deviation 5. What score would a student need to be among the top 10% of all test scores?

------

Find the z-score with a right tail of 10%

invNorm(0.9) = 1.2816

----

Find the correspondiing score value

----

x = z*s + u

x = 1.2816*5 + 73 = 79.4

-----

Ans: score >= 79.4

best my answer

Mar 2nd, 2015

Did you know? You can earn $20 for every friend you invite to Studypool!
Click here to
Refer a Friend
...
Mar 2nd, 2015
...
Mar 2nd, 2015
Sep 22nd, 2017
check_circle
Mark as Final Answer
check_circle
Unmark as Final Answer
check_circle
Final Answer

Secure Information

Content will be erased after question is completed.

check_circle
Final Answer