SCENARIO 8-12-B
You Are the Quality Control Manager of a Water

question 66

Short Answer

SCENARIO 8-12-B
You are the quality control manager of a water bottles company. One of the biggest complaints in the
past years has been the breakage and, hence, the concern on the durability of the connector between
the lid and the bottle which many users use as a handle for the bottles. To collect evidence before
implementing any modification to the production process, your department has subjected 50 water
bottles to a durability test and the following data on the number of times the handles have been used
to lift the bottles before they break are contained in the file SCENARIO 8-12-B.XLSX. $$\begin{array} { l l l l l l l l l l } 493 & 506 & 515 & 491 & 500 & 505 & 517 & 510 & 506 & 503 \\503 & 491 & 495 & 496 & 496 & 505 & 493 & 486 & 504 & 483 \\514 & 494 & 497 & 501 & 493 & 490 & 510 & 494 & 494 & 495 \\494 & 486 & 495 & 506 & 506 & 507 & 502 & 498 & 510 & 501 \\500 & 505 & 492 & 486 & 501 & 496 & 501 & 521 & 510 & 498\end{array}$$ Assume that and the number of times the handles have been used to lift the bottles before they break
follows a normal distribution.
-Referring to Scenario 8-12-B, the critical value used to construct the 95% confidence interval for
the mean number of times the handles have been used to lift the bottles before they break is _____.

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Definitions:

Spongy Bone

A type of bone that is porous and less dense, found at the ends of long bones and in the inner layers of other bones, providing structural support and flexibility.

Connective Tissue

Tissue that supports, binds together, and protects organs, consisting of cells embedded in a large amount of extracellular matrix.

Central Canal

The cerebrospinal fluid-filled space running longitudinally through the length of the entire spinal cord.

Blood Vessels

Tubular structures that carry blood throughout the body, including arteries, veins, and capillaries.