Use the following to answer the questions below:
In a regression analysis based on a sample of size n = 30, SSModel = 750 and SSTotal = 2,500.
-Compute the standard deviation of the error term. Use two decimal places in your answer.
A) 7.91
B) 6.25
C) 1.50
D) 7.64

Question

Quizplus · Accepted Answer

The standard deviation of the error term (standard error of the estimate) is calculated as the square root of the mean square error (MSE). First, find SSE (SSTotal - SSModel = 2500 - 750 = 1750). Then, MSE = SSE / (n - 2) = 1750 / 28 = 62.5. The standard deviation is the square root of MSE, which is √62.5 ≈ 7.91.

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