An environmental agency polled 723 retired Scots and 372 Scottish high school students on their opinion on closing all N

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An Environmental Agency Polled 723 Retired Scots And 372 Scottish High School Students On Their Opinion On Closing All N 1 (94.9 KiB) Viewed 43 times

An environmental agency polled 723 retired Scots and 372 Scottish high school students on their opinion on closing all North Sea oil and gas platforms in the next 10 years. 22% of the retired people and 35% of the high school students said that all North Sea oil and gas platforms should be closed in the next 10 years. We will assume these samples are representative of their respective populations and denote the population proportions of people who think that all North Sea oil and gas platforms should be closed in the next 10 years amongst retired people and high school students as pr and ps, respectively. (a) Suppose we want to conduct a hypothesis test for evaluating whether there is a difference between the proportions of retired people and high school students who think that all North Sea oil and gas platforms should be closed in the next 10 years. () Select the correct null and alternative hypotheses for this scenario: OH, PR + ps HA: PR = PS OH, : PR = PsHA : PR<PS OH, : PR = PS HA: PR + ps OH, :PR = PsHA : PR > PS [1 mark] (11) Calculate the point estimate of the difference in the population proportions (to two decimal places) and enter it here: [2 marks]