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

question 144

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 lower and upper bounds of the 95% confidence interval for the
mean number of times the handles have been used to lift the bottles before they break are ____ and
_____.

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Definitions:

Longitudinal Section

A slice or section of an object or organism made along its length, used to visualize internal structures in relation to its long axis.

Parenchyma

Tissue found in plants, consisting of unspecialized living cells with thin cell walls, involved in photosynthesis, storage, and tissue repair.

Meristematic

Referring to regions in plants where undifferentiated cells (meristems) are actively dividing, allowing for growth in length or diameter.

Woody Plants

Plants that are primarily made of wood and have a hard stem, usually trees and shrubs.