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A data set with 7 observations yielded the following. Use the simple linear regression model.
∑X = 21.57
∑X2 = 68.31
∑Y = 188.9
∑Y2 = 5,140.23
∑XY = 590.83
SSE = 1.117
Determine the 95 percent confidence interval for the average value of Y when x = 3.25.
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