Calculating the C-Chart Limits
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The school board is trying to evaluate a new math program introduced to second-graders in five elementary 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 c-chart for test errors, and set the control limits to contain 99.73% of the random variation in test scores. What does the chart tell you? Has the new math program been effective
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Solution Summary
This solution develops and analyzes a c-chart for the given case with step-by-step calculations in an excel file. It determines the mean, standard deviation, upper control limit, central line and lower control limit.
Education
- BEng (Hons) , Birla Institute of Technology and Science, India
- MSc (Hons) , Birla Institute of Technology and Science, India
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