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The Springfield Emergency Medical Service keeps records of emergency telephone calls. A study of 150 five-minute time intervals resulted in the distribution of number of
The Springfield Emergency Medical Service keeps records of emergency telephone calls. A study of 150 five-minute time intervals resulted in the distribution of number of calls as follows. For example, during 18 of the five-minute intervals, no calls occurred. Use the chi-square goodness-of-fit test and?=.01to determine whether this distribution is Poisson.
Find the observed value of chi-square. Round the answer to 2 decimal places.
Number of Calls
(per 5-minute interval) Frequency
0 18
1 28
2 47
3 21
4 16
5 11
6 or more 9
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