In a randomized controlledtrial, insecticide-treated bednets were tested as a way to reduce malaria. Among 309 infants usingbednets, 20 developed malaria. Among 262 infants not usingbednets developed malaria. Use a 0.01 significance level to test the claim that the incidence of malaria is lower for infants using bednets. Do the bednets appear to beeffective? Conduct the hypothesis test by using the results from the given display.

Difference= p(1)-p(2)

Estimate fordifference: -0.0497789

99% upper bound fordifference: 0.01241034

Test for difference= (vs<0) Z=2.10 P-Value=0.018

Identify the test statistic.