statistics

dud

New member
Joined
Feb 11, 2011
Messages
4
Using the normal curve table for this problem. If a person received a test score that was in the top 20% of everyone who has taken the test and the test scores are normally distributed. This person's Z score must be at least:

1.46
.84
1.26
.56
 

tkhunny

Moderator
Staff member
Joined
Apr 12, 2005
Messages
9,787
What's your emperical rule? One standard deviation is 34%-ish. Z = 1, then, would represent about 84%. That's too big. This discards two of the choices. What say you of the other two?
 
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