The null and alternative hypotheses are:
A sample of 100 observations from the first population indicated that X1 is 70. A sample of 150 observations from the second population revealed that X2 is 90. It uses a significance level of 0.05 to test the hypothesis.
a) Formulate the decision rule.
b) Calculate the joint proportion.
c) Calculate the statistic value of the test.
d) What is your decision regarding the null hypothesis?