S6.23 The school board is trying to evaluate a new math program introduced to second-graders in five
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• • S6.23 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:
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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