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 the appropriate 3-sigma control chart. What does the chart tell you? Has the

new math program been effective?

Please written with an explanation of how you got the answers. Not just the answers alone. Thank you!