DIRECTION: State the null hypothesis and alternative hypothesis that should be used to test each of the following claims and determine the tail(s) of the test. . A lecturer claims that his student scored an average of 80 marks in their statistics test. The subject coordinator wants to know whether the lecturer claim is acceptable. . A drug company produced a new pain-relieving drug for migraine suffers and advertisements stated that the drug had a 90% success rate. A Doctor doubted whether the drug would be a successful as the company claimed. . A light bulb manufacturer has developed a new light bulb that is claimed to have an average life more than 1,000 hours. . A pizza delivery company claims that its average time is less than 30 minutes. . A courier express delivery service company claims it takes an average of 24 hours to send a package from Manila to any city in Visayas or Mindanao. An independent customer agency is doing a study to test the truth of his claim

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