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Confidence Intervals for thickness of paper in Fax machines

You are a quality analyst with John and Sons Company. Your company manufactures fax machines, copiers, and printers that use plain paper. The CEO of the company wants the machines to handle 99.5 percent of all the paper that is used in them without the paper getting jammed. The CEO asks you to determine the thickness of paper that the machines must be able to handle to achieve this target. Using the data provided. Prepare a memo to the CEO in a Word document, detailing the appropriate confidence limits for the thickness of paper that the machines must be able to handle.

Thickness
0.00385
0.00358
0.00372
0.00418
0.00380
0.00399
0.00424
0.00375
0.00449
0.00422
0.00407
0.00434
0.00381
0.00421
0.00397
0.00425
0.00449
0.00462
0.00467
0.00404
0.00391
0.00431
0.00398
0.00415

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