A Manufacturing Operation Consists of a Unique System That Produces

question 121

Multiple Choice

A manufacturing operation consists of a unique system that produces an average of 15.5 jet engine propulsion parts every hour. After undergoing a complete overhaul, the system was monitored by observing the number of parts produced in each of 17 randomly selected one-hour periods. The mean is 15.42 with a standard deviation of 0.16. Assume the number of parts produced is approximately normal.
-The null and alternative hypotheses to test whether the number of parts produced by the overhauled system differs from 15.5 is _____.

• A)H₀: ? = 15.5 vs.H_a: ? ? 15.5
• B)H₀: ? ? 15.5 vs.H_a: ? < 15.5
• C)H₀: ? ? 15.42 vs.H_a: ? < 15.42
• D)H₀: ? ? 15.5 vs.H_a: ? = 15.5
• E)H₀: ? ? 15.5 vs.H_a: ? > 15.5

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Definitions:

Proactive Interference

The phenomenon by which previously learned information interferes with the recall of new information.

Source-monitoring Error

A type of memory error where a person misidentifies the source of a memory, such as confusing whether an event was experienced or imagined.

Retrieval Cue

A stimulus that allows or aids the recall of information stored in memory.

Elaboration Encoding

A mnemonic device involving the addition of extra information to aid in the memory of something.