The Standard Normal table: Read it
Prof. J. Murdock
This handout is required reading for all students in ECO220Y1Y in 2009/10.
1
The last page
(page 3) provides the specific Standard Normal table that you will be given at assessments,
which includes the final examination. The first two pages show examples of reading “the table”
on page 3. Our textbook used this very common version of the table in all previous editions,
but not in the current edition (8th). The answers and concepts do not depend on the version
of the table. You should acquire the skill of reading statistical tables no matter which way
they are constructed. If you understand probability distributions, which is a requirement of
our course, then you can figure out any statistical table. However, you may not want to figure
it out for the first time during an assessment, which is why I put together this handout.
I
would recommend using this table when doing your homework.
Example A.
Looking at the middle of the table find the number 0.3770. What does that mean? Referring
to the associated row and column headings, it means that
P
(0
< Z <
1
.
16) = 0
.
3770. Notice
how that corresponds with the picture at the top right of the table.
Example B.
Looking at the top left of the table find the number 0.0000. What does that mean? Referring
to the associated row and column headings, it means that
P
(0
< Z <
0
.
00) = 0
.
0000. In other
words, there is no area under the standard normal curve between zero and zero. Remember
that for all continuous distributions the probability of a specific value is zero. The probability
is the area under the density function. If there is no width, there can be no area.
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 Spring '09
 ATAMAZAHERI
 Economics, Normal Distribution

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