An agricultural researcher plants 25 plots with a new variety of yellow corn. Assume that the yield per acre for the new variety of yellow corn follows a normal distribution with unknown mean µ and standard deviation o = 10 bushels per acre. If the average yield for these 25 plots is x = 150 bushels per acre. What is a 90% confidence interval for u? A. 150 ± 0.784 В. 150 + 2.000 C. 150 ± 3.290 D. 150 + 3.920

A First Course in Probability (10th Edition)
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Chapter1: Combinatorial Analysis
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An agricultural researcher plants 25 plots
with a new variety of yellow corn.
Assume that the yield per acre for the new
variety of yellow corn follows a normal
distribution with unknown mean µ and
standard deviation o = 10 bushels per
acre. If the average yield for these 25
plots is x = 150 bushels per acre. What
is a 90% confidence interval for u?
A. 150 ± 0.784
В. 150 + 2.000
C. 150 ± 3.290
D. 150 + 3.920
Transcribed Image Text:An agricultural researcher plants 25 plots with a new variety of yellow corn. Assume that the yield per acre for the new variety of yellow corn follows a normal distribution with unknown mean µ and standard deviation o = 10 bushels per acre. If the average yield for these 25 plots is x = 150 bushels per acre. What is a 90% confidence interval for u? A. 150 ± 0.784 В. 150 + 2.000 C. 150 ± 3.290 D. 150 + 3.920
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