A Pizza Delivery Service Wants to Track Their Delivery Times

question 51

Multiple Choice

A pizza delivery service wants to track their delivery times. They take eight samples of four deliveries and record the following data. What are the upper and lower control limits of their X-bar chart? $\begin{array}{|l|c|c|c|c|c|c|c|c}\text { Sample \# } & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 \\\hline \text { Item \#1 } & 21.1 & 20.2 & 24.1 & 22.6 & 21.2 & 20.9 & 22.4 & 20.9 \\\hline \text { Item \#2 } & 21.7 & 20.6 & 21.7 & 21.7 & 24.1 & 23.5 & 24.6 & 24.7 \\\hline \text { Item \#3 } & 23.0 & 24.5 & 23.2 & 23.0 & 20.6 & 22.8 & 23.4 & 22.8 \\\hline \text { Item \#4 } & 20.3 & 23.5 & 24.4 & 25.0 & 20.7 & 23.2 & 23.3 & 24.5 \\\hline \text { Sum } & 86.1 & 88.8 & 93.4 & 92.3 & 86.6 & 90.4 & 93.7 & 92.9\\\hline\end{array}$

• A)24.9, 20.3
• B)23.8, 21.4
• C)22.6, 19.5
• D)21.1, 17.6

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Definitions:

Reverse Transcriptase

An enzyme that catalyzes the transcription of RNA into DNA, allowing retroviruses to integrate into the host genome.

CDNA

Complementary strand of DNA synthesized from an RNA template by the enzyme reverse transcriptase.

Medical Application

The use or practice of medicine and healthcare techniques for diagnostic, therapeutic, or preventive purposes.

Transgenic Organism

An organism that has had foreign DNA inserted into its genome, often to express a new trait not found naturally in the species.