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IPHY
2800
SPSS Assignment
3
Due Recitation
4
The following
65 test scores from a written examination
will be used as data for this
assignment.
This assignment
is worth 24 points.
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By hand,
following
the handout discussed in class, construct a frequency
distribution
having an interval size of one and use it to convert these scores to percentiles
(2 points).
(In the PR column round to whole numbers). Turn this in with your assignment
and use it
to answer the following
questions.
1. How many students actually scored below 50 points on the exam?
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2. What percentage of 65 is your answer to question
I? (1 point)
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3. What percentile score is assigned to students scoring 50 on the exam? (l point)lS
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4. Why do the answers to questions 2 and 3 differ? (lpoint)
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Now enter
the data
into SPSS.
Call the data column testscr and label it Test Scores.
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Remember
that this is numeric data and the last column in the Variable View box
ShOUld~~OU~e
be labeled Scale.
Go to the Data View box to enter all 65 test scores.
Next, click on
P
e
Graphs on the top menu and select Histogram.
Under the Histogram
screen move the
'O·e.A'Dv)'S"'D)
highlighted
Test Scores into the Variable box using the arrow and click OK.
A frequency
OfQiAh ~
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histogram
will appear, but we want to change the intervals a bit. To do this, double click
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 Spring '08
 DECKER,MIK

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