Question

Conduct the following test at the alphaαequals =0.01 level of significance by determining​ (a) the null and alternative​ hypotheses, (b) the test​ statistic, and​ (c) the critical value. Assume that the samples were obtained independently using simple random sampling.

Test whether

p 1 not equals p 2p1≠p2.

Sample data are

x 1 equals 28x1=28​,

n 1 equals 254n1=254​,

x 2 equals 38x2=38

n 2 equals 301n2=301.

I know the test statistic z is equal to -.56 but what are the critical values?

Answer 1