The hypothetical data below are from a toxicity study designed to measure the effectiven...

The hypothetical data below are from a toxicity study designed to measure the effectiveness of different doses of a pesticide on mosquitoes. The table below summarizes the concentration of the pesticide, the sample sizes, and the number of critters dispatched.

a. Make a scatterplot of the proportions of mosquitoes killed versus the pesticide concentration.

b. Using the techniques introduced in this section, calculate for each of the concentrations and fit the line What is the significance of a positive slope for this line?

c. The point at which the dose kills 50% of the pests is sometimes called LD50, for “Lethal dose 50%.” What would you estimate to be LD50 for this pesticide when used on mosquitoes?