An agricultural researcher plants 50 plots with a new variety of potatoes. A 90% confidence interval for the average yield for these plots is found to be 107.8 ± 4.2 potatoes per acre. Which of the...

Extracted text: An agricultural researcher plants 50 plots with a new variety of potatoes. A 90% confidence interval for the average yield for these plots is found to be 107.8 ± 4.2 potatoes per acre. Which of the following would produce a confidence interval with a smaller margin of error than this one? Using 25 plots, rather than 50. I hope you don't select this answer Using 100 plots, rather than 50. I don't know a b