Review the SPSS output file that reports the results of the related samples t -t
ID: 2948493 • Letter: R
Question
Review the SPSS output file that reports the results of the related samples t-test to compare the number of U.S. states where each brand was sold in 2008 with the number of U.S. states where those same brands were sold in 2012. For each brand, there is one value for the number of states in 2008 and another value for the number of states in 2012, making this a repeated measure. Answer the following questions based on your observations of the SPSS output file:
What was the mean number of U.S. states in which all of the beer brands were sold in 2008?
What was the mean number of U.S. states in which all of the beer brands were sold in 2012?
Was there a significant difference in the number of states in which these beer brands were sold in 2008 versus 2012? Report the results of the t-test as follows: t(df value) = ___, and p-value.
T-Test
Notes
Output Created
07-JUN-2013 12:05:33
Comments
Input
Data
C:UsersdonnDocumentsGCU Lead facProject with Judy for modifying PSY845 to introduce SPSSdrinks database -revised for course applications DH.sav
Active Dataset
DataSet1
File Label
SPSS/PC+
Filter
<none>
Weight
<none>
Split File
<none>
N of Rows in Working Data File
35
Missing Value Handling
Definition of Missing
User defined missing values are treated as missing.
Cases Used
Statistics for each analysis are based on the cases with no missing or out-of-range data for any variable in the analysis.
Syntax
T-TEST PAIRS=States2008 WITH States2012 (PAIRED)
/CRITERIA=CI(.9500)
/MISSING=ANALYSIS.
Resources
Processor Time
00:00:00.00
Elapsed Time
00:00:00.01
[DataSet1] C:UsersdonnDocumentsGCU Lead facProject with Judy for modifying PSY845 to introduce SPSSdrinks database -revised for course applications DH.sav
Paired Samples Statistics
Mean
N
Std. Deviation
Std. Error Mean
Pair 1
Total number of US states selling beer in 2008
16.2286
35
14.63494
2.47376
Total number of US states selling beer in 2012
21.2000
35
15.48965
2.61823
Paired Samples Correlations
N
Correlation
Sig.
Pair 1
Total number of US states selling beer in 2008 & Total number of US states selling beer in 2012
35
.880
.000
Paired Samples Test
Paired Differences
Mean
Std. Deviation
Std. Error Mean
95% Confidence Interval of the Difference
Lower
Pair 1
Total number of US states selling beer in 2008 - Total number of US states selling beer in 2012
-4.97143
7.43792
1.25724
-7.52644
Paired Samples Test
Paired Differences
t
df
Sig. (2-tailed)
95% Confidence Interval of the Difference
Upper
Pair 1
Total number of US states selling beer in 2008 - Total number of US states selling beer in 2012
-2.41641
-3.954
34
.000
Notes
Output Created
07-JUN-2013 12:05:33
Comments
Input
Data
C:UsersdonnDocumentsGCU Lead facProject with Judy for modifying PSY845 to introduce SPSSdrinks database -revised for course applications DH.sav
Active Dataset
DataSet1
File Label
SPSS/PC+
Filter
<none>
Weight
<none>
Split File
<none>
N of Rows in Working Data File
35
Missing Value Handling
Definition of Missing
User defined missing values are treated as missing.
Cases Used
Statistics for each analysis are based on the cases with no missing or out-of-range data for any variable in the analysis.
Syntax
T-TEST PAIRS=States2008 WITH States2012 (PAIRED)
/CRITERIA=CI(.9500)
/MISSING=ANALYSIS.
Resources
Processor Time
00:00:00.00
Elapsed Time
00:00:00.01
Explanation / Answer
What was the mean number of U.S. states in which all of the beer brands were sold in 2008?
From the output, mean number of U.S. states in which all of the beer brands were sold in 2008 is 16.2286
What was the mean number of U.S. states in which all of the beer brands were sold in 2012?
From the output, mean number of U.S. states in which all of the beer brands were sold in 2012 is 21.2000
Was there a significant difference in the number of states in which these beer brands were sold in 2008 versus 2012? Report the results of the t-test as follows: t(df value) = ___, and p-value.
df value = 34
t statistic = -3.954
P-value = 0.000
As, the p-value is less than the significance level of 0.05, there a significant difference in the number of states in which these beer brands were sold in 2008 versus 2012.
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