An ecologist is studying the impact of pesticides on honey bees and plans an ecological survey to determine what proportion of bees have pesticides present in their bodies. The ecologist decides to use a confidence level of 95 % 95% and a margin of error of 5 % 5%, but they do not have an estimated value for the sample proportion. Use the statistical tool to calculate the necessary sample size for the ecological survey. Hint In the statistical tool, select the Find Sample Size tab and use the toggle to select the Desired Confidence Level. Necessary sample size =