The number of emergency calls per day at a hospital over a period of 120 days is shown below.
Number of
Observed
Emergency Calls (x)
Frequency (f)
0
9
1
12
2
30
3
27
4
22
5
13
6 or more
7
Total
120
?
Use ? = .05 and the p-value approach to see if the above data have a Poisson distribution.
What will be an ideal response?
?2 = 4.72; p-value is greater than .1; do not reject H0; no evidence that the distribution is not Poisson.
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