The Mean Attention Span for Adults in a Certain Village

question 79

Multiple Choice

The mean attention span for adults in a certain village is 15 minutes with a standard deviation of 6.4. The mean of all possible samples of size 30, taken from that population equals _________.

• A) 15
• B) 0.50
• C) 30
• D) 2.34

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Definitions:

Output Device

Any connected equipment that will receive information or instructions from the central processing unit, such as control devices (e.g., motors, solenoids, alarms) or peripheral devices (e.g., line printers, disk drives, displays). Each type of output device has a unique interface to the processor.

Output Device

A piece of hardware used to communicate the results of data processing done by an information processing system to the outside world.

PLC Problem

An issue or malfunction within a Programmable Logic Controller (PLC) that affects its operation or performance.