Next, we will examine an entirely different question. Do the states that voted for McCain have a different average percent of heavy drinkers than the states that voted for Obama in the 2008 election.  1. Based on the p-value, what decision would you make? Summarize your conclusions. 2. This table also gives a 95% confidence interval for the difference. Report the confidence interval and interpret it.

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Next, we will examine an entirely different question. Do the states that voted for McCain have a different average percent of heavy drinkers than the states that voted for Obama in the 2008 election. 

1. Based on the p-value, what decision would you make? Summarize your conclusions.

2. This table also gives a 95% confidence interval for the difference. Report the confidence interval and interpret it.

T-Test
[DataSet2] W:\syr\CourseInformation\MTH 112\dilmore\USstates.sav
Group Statistics
ObamaMcCain
N
Mean
Std. Deviation Std. Error Mean
HeavyDrinkers M
22
4.255
1.0060
.2145
28
5.446
1.1154
.2108
Independent Samples Test
Levene's Test for Equality of
t-test for Equality of
Means
Variances
F
Sig.
df
HeavyDrinkers Equal variances assumed
.045
.832
-3.914
48
Equal variances not
-3.963
47.031
assumed
Transcribed Image Text:T-Test [DataSet2] W:\syr\CourseInformation\MTH 112\dilmore\USstates.sav Group Statistics ObamaMcCain N Mean Std. Deviation Std. Error Mean HeavyDrinkers M 22 4.255 1.0060 .2145 28 5.446 1.1154 .2108 Independent Samples Test Levene's Test for Equality of t-test for Equality of Means Variances F Sig. df HeavyDrinkers Equal variances assumed .045 .832 -3.914 48 Equal variances not -3.963 47.031 assumed
Independent Samples Test
t-test for Equality of Means
Mean
Std. Error
Sig. (2-tailed)
Difference
Difference
HeavyDrinkers Equal variances assumed
.000
-1.1919
.3045
Equal variances not
.000
-1.1919
.3007
assumed
Independent Samples Test
t-test for Equality of Means
95% Confidence Interval of the
Difference
Lower
Upper
HeavyDrinkers Equal variances assumed
-1.8042
-.5796
Equal variances not
-1.7969
-.5869
assumed
Transcribed Image Text:Independent Samples Test t-test for Equality of Means Mean Std. Error Sig. (2-tailed) Difference Difference HeavyDrinkers Equal variances assumed .000 -1.1919 .3045 Equal variances not .000 -1.1919 .3007 assumed Independent Samples Test t-test for Equality of Means 95% Confidence Interval of the Difference Lower Upper HeavyDrinkers Equal variances assumed -1.8042 -.5796 Equal variances not -1.7969 -.5869 assumed
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