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Chi-square Test

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The Springfield Emergency Medical Service keeps records of its calls. A study of 150 five-minute time intervals resulted in the distribution of number of calls. Use a .01 level of significance and do a chi-square goodness of fit analysis for the data. Analyze the results and interpret what they mean. Use the 5-step hypothesis testing procedure and determine whether this distribution is Poisson

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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Solution Summary

The solution tests the goodness of fit of a Poisson Distribution.