Do college students who have volunteered for community service work differ from those who have not? A study obtained data from 57 students who had done service work and 17 who had not. One of the response variables was a measure of attachment to friends (roughly, secure relationships), measured by the Inventory of Parent and Peer Attachment. The results are summarized in the table below.
|
Group
|
Condition
|
n
|
s
|
Sample mean, xbar
|
|
1
|
Service
|
57
|
14.68
|
105.32
|
|
2
|
No Service
|
17
|
14.26
|
96.82
|
What is the two-sample t-statistic to test the null hypothesis that m1=m2? (Answer to the nearest hundredth.)