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
_____.

---

Definitions:

Perineal Care

The practice of cleaning the genital and anal areas to prevent infection and maintain hygiene, often as part of personal care routines or healthcare procedures.

Foreskin

The retractable fold of skin covering the glans of the penis in uncircumcised males, serving protective and sensory functions.

Eye Care

The practice of maintaining the health of the eyes through routine checkups, treatment, and preventive measures.

Canthus

The angular junction where the upper and lower eyelids meet, either on the side near the nose (medial canthus) or on the side away from the nose (lateral canthus).