People were asked whether they thought global warming was happening. The table shows the results of the

Question:

People were asked whether they thought global warming was happening. The table shows the results of the survey.

a. Assume these data are from random samples, and test the hypothesis that year and opinion are independent. Report the value of the chi square statistic, the p-value, and the conclusion.
b. Double all the numbers and repeat the test, reporting the chi-square value, the p-value, and the conclusion.
c. Explain the difference in results between parts a and b.