The Global Charitable Trust asked, “How often do you donate?” The response sometimes was given by 22.1% of the 1532 respondents in Country A and by 46.7% of the 1098 respondents in Country B.

(a) Assuming random sampling, the 95% confidence interval for the difference between corresponding population proportions is (0.21, 0.28). Interpret it.

(b) The P-value is <0.0001 for testing the null hypothesis that the corresponding population proportions are equal.

Interpret.