TABLE 17-4 A Factory Supervisor Is Concerned That the Time It Takes

question 52

Multiple Choice

TABLE 17-4
A factory supervisor is concerned that the time it takes workers to complete an important production task (measured in seconds) is too erratic and adversely affects expected profits. The supervisor proceeds by randomly sampling 5 individuals per hour for a period of 10 hours. The sample mean and range for each hour are listed below.
She also decides that lower and upper specification limit for the critical-to-quality variable should be 10 and 30 seconds, respectively.
-Referring to Table 17-4, suppose the supervisor constructs an chart to see if the process is in-control. What is the center line of the chart?

• A) 20.00
• B) 20.26
• C) 21.00
• D) 24.26

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Definitions:

mRNA

Messenger RNA; a single-stranded RNA molecule that conveys genetic information from DNA to the ribosome, where they specify the amino acid sequence of the protein products of gene expression.

Complementary DNA

A form of DNA synthesized from a messenger RNA template, allowing for the study or manipulation of gene expression.

Reverse Transcriptase

An enzyme used by retroviruses to transcribe their RNA into DNA, allowing it to be integrated into the host's genome.

Template

A pattern or model used as a guide for making something accurately, including in DNA replication and transcription processes.