A school requires an entrance exam score that is in the top 3% of the population in order to be accepted.

2 answers:

8 0

First, we assume the distribution is normal, since it is not given in the question.

Next, get a Z-table, such as
stat.ufl.edu/~athienit/Tables/Ztable.pdf
and look through the table for 97% shaded.
The corresponding Z-value should be 1.88 SD (standard deviations) for 96.99%.
Now since
Z=(X-mean)/SD
where
mean=500, SD=55
Solve for X.

____ [38]3 years ago

5 0

A. 485 is %3 of 500, but the deviation sets it slightly lower than that

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The area of each triangle will be
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