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STATISTICS 7.2 & 7.3. Quality content you can rely on!

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STATISTICS 7.2 & 7.3. Quality content you can rely on!

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STATISTICS 7.2 & 7.3.
Quality content you can rely on!
There are two college entrance exams that are often taken by students, Exam A and
Exam B. The composite score on Exam A is approximately normally distributed with
mean 20.5 and standard deviation 4.6..
.
The composite score on Exam B is approximately normally distributed with mean 1020
and standard deviation 212.
.
Suppose you scored 23 on Exam A and 1153 on Exam B. Which exam did you score
better on? Justify your reasoning using the normal model. - Answer: The score on B is
better, because the percentile for Exam B score is higher.


A normal score is the expected z-score of a data value, assuming the distribution of the
random variable is normal. Is this statement true or false? - Answer: True


A normal probability plot is a graph that plots observed data versus normal scores. A
normal score is the expected z-score of a data value, assuming that the distribution of
the random variable is normal.




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