Question

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 an unknown mean of u and a standard deviation of o= 10 bushels per acre. 24. Which of the following would produce a confidence interval with a smaller margin of error than the 90% confidence interval? A) Plant only five plots rather than 25, because five are easier to manage and control. B) Plant 10 plots rather than 25, because a smaller sample size will result in a smaller margin of error. C) Plant 100 plots rather than 25, because a larger sample size will result in a smaller margin of error. Compute a 99% confidence interval rather than a 90% confidence interval, because a higher confidence level will result in a smaller margin of error.