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:

Karyogamy

The final phase of the sexual cycle of fungi and algae, where the nuclei of two mating types or gametes fuse together to form a zygote.

Basidium

A microscopic, spore-producing structure found on the gills under the cap of a mushroom, characteristic of Basidiomycota fungi.

Mushrooms

Fungi that produce a fruiting body above or on the surface of soil, commonly edible and known for their variety in form and biological properties.

Blastospores

A type of spore produced by some fungi and protozoans during asexual reproduction, serving as an agent for dissemination.