The mean time from receipt of application to a final decision for a routine citizenship request in Canada is 25 months.6 In an effort to shorten this lengthy process, the government of Canada has...

The mean time from receipt of application to a final decision for a routine citizenship request in Canada is 25 months.6 In an effort to shorten this lengthy process, the government of Canada has installed a sophisticated electronic record system and hired more staff. A study will be conducted to determine whether these actions have been effective. State the null and alternative hypothesis in terms of
 the mean time from receipt of application to a final decision.

The Sparks City Council in Nevada will build a new dock at the Sparks Marina if more than 80% of the residents favor the plan. A random sample of residents will be obtained, and their responses will be used to test the relevant hypothesis. Let p be the population proportion of residents who favor a new marina. Which of the following sets of null and alternative hypotheses is appropriate? Justify your answer.