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margin of error

mattdrankin

New member
Joined
Oct 24, 2009
Messages
11
Suppose you administer a certain aptitude test to a random sample of 9 students in your high school, and the average score is 105. We want to determine the mean ? of the population of all students in the school. Assume a standard deviation of ? = 15 for the test.


What is the margin of error?
 

galactus

Super Moderator
Staff member
Joined
Sep 28, 2005
Messages
7,216
I thought I just answered this in your last post.
 

mattdrankin

New member
Joined
Oct 24, 2009
Messages
11
you told me to look up a t table and i didn't see 98% any where in the t table but i did see the 8 thing
 
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