Gardeners on the west coast of the United States are investigating the difference in survival rates of two flowering plants in drought climates. Plant A has a survival rate of 0.79 and plant B has a survival rate of 0.43. The standard error of the difference in proportions is 0.083. What is the margin of error for a 99% confidence interval? Use critical value z = 2.576.
MOE =
Round all calculations to three decimal places.
Solution:
Margin of error = Z * standard error
= 2.576 * 0.083
= 0.214
MOE = 0.214
Gardeners on the west coast of the United States are investigating the difference in survival rates...