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QUESTION 3 d is a calculated value used for the confidence interval when estimating: The mean of the population b. Differen
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Answer #1

Option (C) is correct.

d is a calculated value used for estimating the confidenve interval when estimating difference between mean using parired observations.

In this we set the hypothesis concern a new variable d, which is based on the difference between paired values from two data sets.

d = x1 - x2

where x1 is the value of variable x in the first data set, and x2 is the value of the variable from the second data set that is paired with x1.

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