During a medical emergency, people who dial 911 expect an ambulance to arrive qu

Question

During a medical emergency, people who dial 911 expect an ambulance to arrive quickly and personnel to provide vital care. A random sample of ambulance response times in minutes were collected. A 95% confidence interval for the population mean response time for ambulances is found to be 7.5 minutes to 9.5 minutes Question 10 Subquestions 10.a 0.5 point(s) What is the sample mean for the response time? O7.5 minutes 8.5 minutes 9.5 minutes O Cannot be determined 10.b 0.5 point(s) A fixed level of significance of 5% was selected to test the hypotheses Ho : = 7.8 minutes vs. H. : 7.8 minutes. What would be your statistical decision? O Reject HO Fail to Reject HO Cannot Tell

Explanation / Answer

10 a.
Margin of Error = Upper - Lower / 2 = (9.5-7.5)/2 = 1
Mean = Lower + Margin of Error = 7.5 + 1 = 8.5

b.
at 95% condidence it is lies in between 7.5 to 9.5
We have evidence that 7.8 lies in between above interval
Failed to Reject Ho

c.
With lessar the LOS interval will be narrowed and it is Reject Ho

d.
Can't tell

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