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?