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 A B C D E NO. OF TEST ERRORS 52 27 35 44 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?