Question

please answer this question subject about Business Statistics. THANKS..

Section 1: Writing hypotheses 1. North River Health Clinic claims that the average waiting time for a patient is 20 minutes. A random sample of 6 patients showed a mean wait time of 23.2 minutes. At the.05 level of significance, does the sample show that the mean wait time is different from 20 minutes? State the null and alternate hypotheses. 2. North River Health Clinic claims that the average waiting time for a patient is 20 minutes. A random sample of 50 patients showed a mean wait time of 23.2 minutes. At the.05 level of significance does the sample show that the mean wait time is greater than 20 minutes? State the null and alternate hypotheses. Over the last few years, North River Health Clinic has had an average waiting time for a patient of 20 minutes. A random sample of 50 patients showed a mean wait time of 18.5 minutes. At the.05 level of significance, does the sample show that the mean wait time has decreased? State the null and alternate hypotheses. 3. Federal regulators are concerned about the quality of drinking water served on airline flights. A sample of 112 flights found unacceptable bacterial contamination on 14 flights. At the.05 level of significance, does this sample show that more than 10% of flights have contaminated water? State the null and alternate hypotheses 4. Federal regulators are concerned about the quality of drinking water served on airline flights. A series of tests last year showed that 8% of flights had unacceptable bacterial contamination. A new sample of 125 flights found unacceptable bacterial contamination on 10 flights. At the.05 level of significance, does this sample show improvement? State the null and alternate hypotheses! 5. An article on the Beer World website stated that 65% of beer drinkers prefer a lager to a pilsner. A local brew pub manager believes this is incorrect, so she plans to test this assertion by surveying 100 customers. Being knowledgeable about statistical testing procedures, you know that the test should be set up before the survey is done. State the null and alternate hypotheses. 6.

Answer 1

D e eet it renews e wat time Bosdececasce Hui )に20 0:65

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