Studies indicate that about 10 percent of polar bears weigh more than 1,000 pounds. A biologist studying the bears thinks that percent might be too high. From a random sample of polar bears, the biologist found only 8 percent of the sample weighing over 1,000 pounds. Which of the following is the most appropriate method for the biologist’s study?
A one-sample z
-test for a sample proportion
A one-sample z -test for a sample proportion

A one-sample z
-test for a population proportion
A one-sample z -test for a population proportion

A one-sample z
-test for a difference in population proportions
A one-sample z -test for a difference in population proportions

A two-sample z
-test for a difference in sample proportions
A two-sample z -test for a difference in sample proportions

A two-sample z
-test for a difference in population proportions