Assignment2ZScores.docx
PSY 305
Assignment 2 (Z Scores) Worksheet
8 Points Possible
This sheet is for your own use in completing the assignment.
Do not share your work with any other student.
· Be sure to enter your responses in the link for Assignment 2.
· Round each decimal answer to two digits or you will get incorrect results on your work and your will get no points. Only the precise answer obtained after rounding to the two decimal places will be correct.
Set of Scores
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X
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X2
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2
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_____
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2
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_____
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3
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_____
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4
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_____
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5
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_____
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7
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_____
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1. _______ Calculate the ![No Image]() for this set of x scores.
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2. _______ Calculate the square of the sum of the X values (i.e., the ![No Image]() )
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3. _______ What is the value of N for this group of X scores (N= number of scores in sample)?
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4. _______What is the sum of the squared X's (i.e, ![No Image]() ) for this set of data.
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5. _______What is the variance for this set of squares (i.e, ![No Image]() )?
Using the raw score formula for the variance
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6. _______What is the standard deviation for this set of scores?
Remember that the standard deviation is the square root of the variance (i.e, S)
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7. _______What is the mean (i.e, ![No Image]() ) for this set of x scores? The mean equals the Sum of X
divided by N.
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8. _______Using the formula for calculating a Z score below calculate a Z score for the raw
score of
7 based on this group of data.
![No Image]()
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46288410
29705050
1
rldbqn=1
MultipleSections
NavigateFreely
False
/main/CourseMod
2
____
____
____
____
S
-
=
2
2
()
X
X
N
N
-
å
å
________
____
Z
-
=
nurkodjase
