Question

A nationwide sample of influential Liberals and Conservatives was asked as a part of a comprehensive survey whether they favoured lowering environmental standards so that high-sulphur coal could be burned in coal-fired power plants. The results were:

	Liberals	Conservatives
Number sampled	675	213
Number in favour	49	28

At the 0.05 level of significance, can we conclude that there is a larger proportion of Conservatives in favour of lowering the standards? Calculate and interpret the p-value.

a. State the decision rule. (Round the final answer to 3 decimal places.)

H₀ is rejected if z  (select one)  is less or is more than __.

b. Compute the pooled proportion. (Round the final answer to 4 decimal places.)

Pooled proportion:

c. Compute the value of the test statistic. (Negative answer should be indicated by a minus sign. Round the final answer to 2 decimal places.)

Value of test statistic:

d. What is your decision regarding the null hypothesis?

Decision  (select one)  Do not reject or Reject

e. Calculate the p-value. (Round the z-value to 2 decimal places. Round the final answer to 4 decimal places.)

p-value is:

Answer 1