Question

In malaria prone countries, an experiment comparing the effectiveness of an

anti-malarial medication vs the distribution and use of mosquito nets was

employed. In 20 villages with the nets, the average number of new cases per

village per month was 6 with a standard deviation of 4. In the 20 villages

receiving the medications, the average was 3 with a standard deviation of 2.

Calculate a 99% confidence interval for the difference in average cases given the

two different interventions. Assume equal variances in the populations so that

you can calculate this interval as we discussed.

Answer 1