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Consider the following results for two samples randomly taken from two populations.
a.Determine the degrees of freedom for the t distribution.
b.At 95% confidence, what is the margin of error?
c.Develop a 95% confidence interval for the difference between the two population means.
Random Variable
A variable whose possible values are numerical outcomes of a random phenomenon, used in probability and statistics to model randomness.
Expected Value
The anticipated value of a variable, calculated as the sum of all possible values each multiplied by the probability of its occurrence.
Variance
An indicator of the distance between values in a dataset, reflecting how much each value deviates from the average.
Random Variable
An entity whose outcomes are numerical and stem from a random process.
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