A review of emergency room records at a rural hosipital was perfomed to determin

Question

A review of emergency room records at a rural hosipital was perfomed to determine the probabilty distribution of the number of patients entering the emergency room during a 1-hour period. The following table lists the distribution:

A. During the randomly selected hour, what is the probablity that the number of patients entering the emeergency room is

1. no more than three

2. at least 2

B. What are the mean and standard deviation of the number of patients the hospital can expect to arrive at the emergency room in any particular hour?

3. Mean

4. Standard Deviation

Patients 0 1 2 3 4 5 6 Probability .25 .35 .20 .12 .05 .02 .01

Explanation / Answer

A review of emergency room records at a rural hosipital was perfomed to determine the probabilty distribution of the number of patients entering the emergency room during a 1-hour period. The following table lists the distribution:

A. During the randomly selected hour, what is the probablity that the number of patients entering the emeergency room is

1. no more than three

2. at least 2

B. What are the mean and standard deviation of the number of patients the hospital can expect to arrive at the emergency room in any particular hour?

3. Mean

4. Standard Deviation

Patients 0 1 2 3 4 5 6 Probability .25 .35 .20 .12 .05 .02 .01

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