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You are using an out of date browser. It may not display this or other websites correctly.You should upgrade or use an alternative browser. 98 percentile
  • Thread starter WlND
  • Start date Nov 10, 2013
W

WlND

New member
Joined Dec 12, 2011 Messages 38 Test scores are normally distributed with mean 100 and standard deviation 16, what is the test score for the 98th percentile? How do I do this question? thanks, WlND stapel

stapel

Super Moderator
Staff member Joined Feb 4, 2004 Messages 16,550
WlND said: Test scores are normally distributed with mean 100 and standard deviation 16, what is the test score for the 98th percentile? How do I do this question? Click to expand...
Have you studied z-scores at all? D

DrPhil

Senior Member
Joined Nov 29, 2012 Messages 1,383
WlND said: Test scores are normally distributed with mean 100 and standard deviation 16, what is the test score for the 98th percentile? How do I do this question? thanks, WlND Click to expand...
"98th percentile" means the point such that 98% of the distribution is below and 2% above the point. W

WlND

New member
Joined Dec 12, 2011 Messages 38 so Z=2.05 2.05= (x-100)/16 x=132.8 H

HallsofIvy

Elite Member
Joined Jan 27, 2012 Messages 7,760 Exactly right. Of course you got that "2.05" from a table of the standard Normal distribution. N(2.05)= 0.98. You must log in or register to reply here. Share: Facebook X (Twitter) Reddit Pinterest Tumblr WhatsApp Email Share Link
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