SPSS Module 4 Assignment—One Sample and Dependent t Tests General Instructions:
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SPSS Module 4 Assignment—One Sample and Dependent t Tests
General Instructions: This assignment deals with using SPSS to perform a one sample and dependent (paired) t-test. As with previous assignments, the Aspelmeier and Pierce text does a wonderful job of explaining how to actually run the tests in Chapter 7. Again I have generated the output for you so you will just need to interpret the results. Use chapter 7 to complete this assignment.
One Sample t test: The population average length of friendships with their closest female friend is known (µ= 69.61) but the population variance is unknown. We know these research situations require the use of the One Sample t Tests. Here are the researchers’ hypotheses: 1. The researchers think that our group of 100 females will score differently than the population on the length of the friendship with their closest female friend. Use the SPSS data to make conclusions. Part 1—The Analyses 1.For this test you would run a One Sample t Tests: one for “Length of the friendship with their closest female friend.”
One Sample t test:
The population average length of friendships with their closest female friend is known (µ= 69.61) but the population variance is unknown. As we learned from the text and the PPTs, we know these research situations require the use of the One Sample t Tests. Here are the researchers’ hypotheses:
1.The researchers think that our group of 100 females will score differently than the population on the length of the friendship with their closest female friend.
Use the SPSS data to make conclusions.
Part 1—The Analyses
1.For this test you would run a One Sample t Tests: one for “Length of the friendship with their closest female friend.” To do that, follow the instruction in Chapter 7. Here is an example and the output:
One-Sample Statistics
N
Mean
Std. Deviation
Std. Error Mean
Length of Closest Female Friendship
100
82.16
53.183
5.318
One-Sample Test
Test Value = 69.61
T
df
Sig. (2-tailed)
Mean Difference
95% Confidence Interval of the Difference
Lower
Upper
Length of Closest Female Friendship
2.360
99
.020
12.550
2.00
23.10
use the following steps to write a complete description of results in proper APA format.
1.State what hypothesis was tested.
2.State what test was used.
3.What decision did you make? Reject the null or retain (fail to reject) the null.
4.Were the groups significantly different from each other?
5.Report the means and standard deviations for each group.
6.Put numbers in APA format:
a.General Format: symbol for the test (df)= obtained value, p> or < significance level
b.Specific for t Tests: t(99)=1.98, p<.05
7.Report Effect Size (if known)
Example:
Adolescent males were expected to score significantly higher on a measure of aggression than were adolescent females. An independent t test was used to test the hypothesis leading to the rejection of the null hypothesis. Adolescent males (M=14.67, SD=2.35) were significantly more aggressive than were adolescent females (M=9.65, SD=1.59), t(78)=3.93, p<.05.
One-Sample Statistics
N
Mean
Std. Deviation
Std. Error Mean
Length of Closest Female Friendship
100
82.16
53.183
5.318
One-Sample Test
Test Value = 69.61
T
df
Sig. (2-tailed)
Mean Difference
95% Confidence Interval of the Difference
Lower
Upper
Length of Closest Female Friendship
2.360
99
.020
12.550
2.00
23.10
One-Sample T Test Test Variable(s): Options Length of Closest F Participants Age Gender [sgender] . Ethnicity [sethnic] Year in College [c.. Where do you live.. Household you g.. Number of Femal. tsat1 Test Value: 69.61 OK Paste Reset Cancel HelpExplanation / Answer
Length of friendship for females with closest friend were expected to be significantly different than the population in general. An independent t test was conducted which led to the rejection of null hypothesis. Length of friendship for females with closest friends were reported to be similar (M=82.16, SD=53.183) compared to the female population in general, t(99)=2.360, p<0.05.
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