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ambulance response time is being studied by the D.C emergency response team. they discovered that the...

ambulance response time is being studied by the D.C emergency response team. they discovered that the response time has an average of u=18.4 mins and a standard deviation of o=4.2. Assume that the distribution of response times is normal and find the probability (or proportion of all observations) that a response time is :

a) more than 25 mins

b) between 15 and 20 mins

math   Statistics-And-Probability   
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