Consider the following results for two samples randomly taken from two populations. 
a.Determine the degrees of freedom for the t-distribution.
b.Develop a 95% confidence interval for the difference between the two population means.
Definitions:
Revocation
The act of officially withdrawing, cancelling, or reversing a decision, offer, or statement.
Counteroffer
A response to an original offer which modifies conditions or proposes new terms, effectively rejecting the initial offer and becoming a new proposal in the negotiation process.
Lapse Of Time
The expiration of a specified duration, after which legal claims may be void or rights may expire.
Valid Offer
A proposal made by one party to another intended to create a legally binding agreement when accepted.
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