Samantha Zid
Assignment 9
86. Write a null hypothesis (in words and symbols) that could be tested using an independent
test. What is the alternative hypothesis (in words and symbols)?
•
Words:
o
H
O
: the means between the group students who took the block 1 test and the
separate group of other students who took the block 2 test are equal
o
H
A
: the means between the group students who took the block 1 test and the
separate group of other students who took the block 2 test are not equal
•
Symbols:
o
H
O
: µ
1
=µ
2
o
H
A
: µ
1
≠µ
2
87. How do you run an independent t test in SPSS?
1.
Click on
ANALYZE
.
2.
Click on
COMPARE MEANS
.
3.
Click on
INDEPENDENT SAMPLE TTEST
4.
A new window will.
5.
You must click on
Define Variables
to define the variable to you placing in the
Grouping Variables
.
a.
Here, you will associate numbers to the different levels of the variable you are
Grouping the Test Variable by. The numbers should be the same as the levels of
the variable you have previously defined (i.e. if you have 1 for men and 2 for
women in your Variable View screen, you should use the same numbering here).
6.
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 Spring '09
 Dr.Hall
 Statistics, Statistical hypothesis testing, Student's ttest, Differenc Differenc, tcrit, Samantha Zid

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