A tire company is interested in monitoring the process that produced tread thickness on its tires.Every hour 4 tires are selected from production and the tread thickness is measured.Data for the past 25 days is shown as follows: 
a.What type of control chart would you recommend be used in this case?
b.Compute the upper and lower control limits for these data.
Definitions:
Additional Investment
Funds that are injected into a business by its owners or shareholders beyond the initial investment, to support operations or growth.
International Accounting Standards
A set of accounting standards developed and overseen by the International Accounting Standards Board (IASB) to ensure transparency, accountability, and efficiency in financial markets worldwide.
Multinational Corporations
Multinational corporations are companies that operate in multiple countries, often with a centralized headquarters but localized operations.
Information Technology
The use of computers, storage, networking, and other physical devices, infrastructure and processes to create, process, store, secure and exchange all forms of electronic data.
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