Calculating the p chart limits for school absenteeism

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Question: Calculating the p chart limits for school absenteeism. Here are data from an urban school district on the number of eighth-grade students with three or more unexcused absences from school during each month of a school year. Because the total number of eighth-graders changes a bit from month to month, these totals are also given for each month.

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(a) Find p. Because the number of students varies from month to month, also find n, the average per month.

(b) Make a p chart using control limits based on n students each month. Comment on control.

(c) The exact control limits are different each month because the number of students n is different each month. This situation is common in using p charts. What are the exact limits for October and June, the months with the largest and smallest n? Add these limits to your p chart, using short lines spanning a single month. Do exact limits affect your conclusions?

Reference no: EM131749520

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