MGT 455 WEEK 4 PROBLEM 6 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:
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? PX
USA 
India