A regional hospital is considering the purchase of a helicopter to transport cri

Question

A regional hospital is considering the purchase of a helicopter to transport critical patients. The relative frequency of X, the number of times the helicopter is used to transport critical patients each month, is created for a similarly sized hospital and is given in the probability distribution below. Find the probability that the helicopter will be used less than 3 times to transport critical patients during a month. Then, determine whether this probability is unusual. A) 0.69; not unusual B) 0.88; unusual C) There is not enough information to determine this probability. D) 0.88; not unusual E) 0.69; unusual

Explanation / Answer

Solution :

The probability that the helicopter will be used less than 3 times to transport critical patients during a month is ,

P( X < 3) = P( X = 0) + P( X = 1) + P( X = 2)

P( X < 3)  = 0.15 + 0.2 + 0.34

P( X < 3)  = 0.69

The probability is less than 0.05 is unusual .

Here 0.69 > 0.05 , so this probability is not unusual .

Option A) is correct : 0.69 ; not unusual .

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