Describe the C-Chart Limits

Problem- 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:

Part 1-SCHOOL NO. OF TEST ERRORS

i 52

ii 27

iii 35

iv 44

E 55

Part 2-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?

Part 3-Has the new math program been effective?

This Description analyzes and develops a c-chart for the given case with step-by-step calculations in an excel file. It calculates the mean, upper control limit, standard deviation, lower control limit and centre lines.