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

question 120

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 width of 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:

Variables

Elements, features, or factors that are likely to change or vary in an experiment or dataset.

Scientific Method

A systematic, organized series of steps that helps ensure objectivity and consistency in exploring a social or scientific problem.

Research Process

The systematic steps followed to collect and analyze information to increase our understanding of a topic or issue.

Issue of Interest

The specific concern or topic that is being studied or analyzed in a research project.