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1. An ambulance service claims that it takes on th...

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1. An ambulance service claims that it takes on the average 8.9 min to reach its destination in emergency calls. The agency that licenses ambulance services timed them on 50 random emergency runs, getting a mean of 9.3 min. We know from another study that the population standard deviation = 1.8 min. Is there evidence to support the claim? Use ? = 0.05. a. State the Null and Alternative Hypotheses: (Identify which hypothesis is the claim) b. Compute the Test statistic: (Round off correctly) c. Find the p-value: d. Make the decision using the Decision Rule. Use the p-value method. e. Write the Conclusion (in plain English as related to the claim). 2. A large city claims that it provides ?free lunch? to more than 30% of its elementary school students. A researcher selects a random sample of 200 students and finds that 72 were getting free lunches. Does the evidence supports the claim at ? = 0.05? a. State the Null and Alternative Hypotheses: (Identify which hypothesis is the claim) b. Compute the Test statistic: (Round off correctly) c. Find the p-value: d. Make the decision using the Decision Rule. Use the p-value method. e. Write the Conclusion (in plain English as related to the claim).

 

Paper#13470 | Written in 18-Jul-2015

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