Response time is an important statistic for measuring the effectiveness of a fire department, and is measured as the difference
between the time a fire station receives a call and the time the first piece of fire equipment leaves the station. The response times for fire departments in a large city are found to have an approximately Normal distribution, with a mean of 4.5 minutes and a standard deviation of 1.2 minutes. What percentage of fire station response times are under 3 minutes?
Find the z-table here.
6.68%
10.56%
89.44%
93.32%
Find the z-table here.
6.68%
10.56%
89.44%
93.32%
1 answer:
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Answer:
First, find two points on the graph:
- (x₁, y₁) = (0, 2)
- (x₂, y₂) = (2, 8)
Slope =
16 + (-3) = 16 - 3 = 13