i need solutions module 4 please help
Review the SPSS output file which reports the results of the independent t-test to compare the mean price per 6-pack for regular vs. reduced calorie brands of wheat beer. Answer the following questions based on your observations of the SPSS output file:
- Is the F-value for Levene’s Test for Equality of Variances significant (that is, is the p < .05)? What is the exact significance level? Note: if the Levene’s Test for Equality of Variances is significant, then equal variances cannot be assumed.
- Which t-value should you use now that you know whether or not equal variances can be assumed? What is that t-value?
- What is the two-tailed significance level for that t-value? State the exact significance value. Report the results of the t-test as follows: t(df value) = ___, and p-value.
- Is there a statistically significant difference between the price per 6-pack of regular beers versus reduced calorie beers?
T-TEST GROUPS=Reducedcals(0 1)
/MISSING=ANALYSIS
/VARIABLES=price
/CRITERIA=CI(.95).
T-Test
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Notes |
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Output Created |
07-JUN-2013 11:20:55 |
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Comments |
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Input |
Data |
C:UsersdonnDocumentsGCU Lead facProject with Judy for modifying PSY845 to introduce SPSSdrinks database -revised for course applications DH.sav |
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Active Dataset |
DataSet1 |
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File Label |
SPSS/PC+ |
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Filter |
<none> |
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Weight |
<none> |
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Split File |
<none> |
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N of Rows in Working Data File |
35 |
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Missing Value Handling |
Definition of Missing |
User defined missing values are treated as missing. |
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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. |
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Syntax |
T-TEST GROUPS=Reducedcals(0 1) /MISSING=ANALYSIS /VARIABLES=price /CRITERIA=CI(.95). |
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Resources |
Processor Time |
00:00:00.02 |
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Elapsed Time |
00:00:00.01 |
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[DataSet1] C:UsersdonnDocumentsGCU Lead facProject with Judy for modifying PSY845 to introduce SPSSdrinks database -revised for course applications DH.sav
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Group Statistics |
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Regular or reduced calorie for brand |
N |
Mean |
Std. Deviation |
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Price per 6-pack for brand |
Regular |
28 |
3.1154 |
1.24040 |
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Reduced Calories |
7 |
2.6757 |
.21870 |
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Group Statistics |
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Regular or reduced calorie for brand |
Std. Error Mean |
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Price per 6-pack for brand |
Regular |
.23441 |
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Reduced Calories |
.08266 |
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Independent Samples Test |
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Levene’s Test for Equality of Variances |
t-test for Equality of Means |
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F |
Sig. |
t |
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Price per 6-pack for brand |
Equal variances assumed |
6.987 |
.012 |
.924 |
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Equal variances not assumed |
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1.769 |
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Independent Samples Test |
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t-test for Equality of Means |
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df |
Sig. (2-tailed) |
Mean Difference |
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Price per 6-pack for brand |
Equal variances assumed |
33 |
.362 |
.43964 |
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Equal variances not assumed |
31.912 |
.086 |
.43964 |
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Independent Samples Test |
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t-test for Equality of Means |
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Std. Error Difference |
95% Confidence Interval of the Difference |
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Lower |
Upper |
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Price per 6-pack for brand |
Equal variances assumed |
.47576 |
-.52829 |
1.40758 |
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Equal variances not assumed |
.24856 |
-.06671 |
.94600 |
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