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Use the standard error to construct an approximate prediction interval for Y using an alpha of...

Use the standard error to construct an approximate prediction interval for Y using an alpha of 5%. (Round your answer to 3 decimal places.)

Prediction interval for Y: yˆiy^i  ± ______

An agribusiness performed a regression of wheat yield (bushels per acre) using observations on 26 test plots with four predictors (rainfall, fertilizer, soil acidity, hours of sun). The standard error was 1.03 bushels.

(a) Find the approximate width of a 95% prediction interval for wheat yield. (Round your answer to 2 decimal places.)

yˆiy^i            ± ________
(b) Find the approximate width using the quick rule. (Round your answer to 2 decimal places.)

yˆiy^i            ± _________

Math   Statistics-And-Probability   
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