SCENARIO 8-13-B
You Are the Quality Control Manager of a Water

question 94

Short Answer

SCENARIO 8-13-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
bottle to 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 Scenario8-13-DataB.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 the population standard deviation is 5 and the number of times the handles have been
used to lift the bottles before they break follows a normal distribution.
-Referring to Scenario 8-13-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:

Friendship Groups

Social collectives that provide emotional, social, and practical support, often characterized by shared interests or common goals.

Informal Groups

Groups that form naturally within an organization based on personal relationships or shared interests rather than structured roles.

Informal Groups

Naturally formed groups within an organization that arise from personal interactions, shared interests, or social needs, outside of the formal organizational structure.

Informal Groups

Collections of individuals within an organization that form naturally around shared interests or social similarities, not defined by formal structure.