QUESTION 3 1 points Save Answe Ambulance response time is measured as the time (

Question

QUESTION 3 1 points Save Answe Ambulance response time is measured as the time (in minutes) between the initial call to emergency medical services and when the patient is reached by an ambulance. For an emergency medical service station, the response time is known to be normally-distributed with =7.5 and -2. Find the most appropriate number for the blank [...] to complete the following sentence At the station, 90% of emergency calls are reached within [ ] minutes. You need to use a standard normal distribution table. Find the nearest answer. O a. 10.7 b. 10.06 c.9.92 d.9.42

Explanation / Answer

mean = 7.5
std.dev. = 2

For 90%, z-value = 1.28

xbar = mean + z*sigma
xbar = 7.5 + 1.28*2
xbar = 10.06

option B

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