lisa123465
20.12.2019 •
Mathematics
An agribusiness performed a regression of wheat yield (bushels per acre) using observations on 20 test plots with four predictors (rainfall, fertilizer, soil acidity, hours of sun). the standard error was 1.13 bushels.
(a) find the approximate width of a 95% prediction interval for wheat yield. (round your answer to 2 decimal places.)
yˆiyi ±
(b) find the approximate width using the quick rule. (round your answer to 2 decimal places.)
yˆiyi ±
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Ответ:
Step-by-step explanation:
If x is the number of hours, then:
48 = 10x + 7
41 = 10x
x = 4.1