I need help to solve these problems Question 3 (of 9) 3. value. points 1000 An a

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I need help to solve these problems

Question 3 (of 9) 3. value. points 1000 An agribusiness performed a regression of wheat yield (bushels per acre) using observations on 22 test plots with four predictors (rainfall, fertilizer, soil acidity, hours of sun). The standard error was 1.16 bushels. (a) Find the approximate width of a 95% prediction interval for wheat yield. (Round your answer to 2 decimal places. (b) Find the approximate width using the quick rule. (Round your answer to 2 decimal places.) (c) The quick rule gives a similar result Yes O No

Explanation / Answer

a) here for 95% CI, z=1.96

hence confidence interval =mean +/- z*std erorr =19.73 ; 24.27

b) from quick rule for 95%

hence confidence interval =mean +/- 2*std erorr =19.68 ; 24.32

c) No

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