Suppose that the useful life of a particular car battery, measured in months, de
ID: 3176050 • Letter: S
Question
Suppose that the useful life of a particular car battery, measured in months, decays with parameter 0.045. We are interested in the life of the battery. On average how long to do you expect the battery to last? Round to nearest tenths. A) 15.2 B) 22.2 C) 27 D)32.7
A web site experiences traffic during normal working hours at a rate of 12 visits per hour. Assume that the duration between visits has the exponential distribution. Find the mean. A)12 B)5 C)6 D)10
At an urgent care facility, patients arrive at an average rate of one patient every seven minutes. Assume that the duration between arrivals is exponentially distributed. Find the quartile 3. Round to the nearest tenth.A) 2 B) 7 C) 9.7 D) 7.9
Explanation / Answer
1) battery expected life =1/0.045=22.2
2) mean =60/12 minute/visit =5
3) Q3 =0.75 =e-t/7
t=2
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