The EMS response time from a notification to the arrival of a crash site in an...
The EMS response time from a notification to the arrival of a crash site in an urban area has a mean of 6.8 minutes and a standard deviation of approximately 3 minutes. The population distribution is skewed right (positively skewed).
a) If we looked into a random sample of 34 crashes in an urban area, then would it be reasonable to say that the sampling distribution of a sample mean, , will be approximately normal? Answer either yes or no.
b) A random sample of 45 crashes in an urban area was selected. Calculate the mean and the standard deviation of the sampling distribution. Round the standard deviation to 4 decimal places.
c) What is the probability that the average EMS response time for these 45 urban area crashes is less than 7 minutes?
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