Construct a control chart for test errors and set the


The School Board is trying to evaluate a new math program introduced to second graders in 5 elementar schools across the county this year. A sample of the student scores on standardized math tests in each elementary school yielded the following data:

School No. Of Test Errors
A 52
B 27
C 35
D 44
E 55

Construct a control chart for test errors and set the control limits to contain 99.73% of the random variations in test scores. What does the chart tell you? Has the new math program been effective?

 

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Operation Management: Construct a control chart for test errors and set the
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