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A Time Study of a Certain Service Task Found an Average

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A time study of a certain service task found an average time of 15 minutes, with a standard sample large enough that we are 95% confident that standard time is within 5% of its true value?


Definitions:

Real Number

A value that represents a quantity along a continuous line, including all rational and irrational numbers.

Opposite Number

The number with the same magnitude but opposite sign to a given number, effectively located on the opposite side of zero on the number line.

Overbar Symbol

A notation used in mathematics to indicate that the value or sequence beneath the bar is repeated infinitely.

Decimal Representation

The expression of numbers in a base-10 system, involving a sequence of digits to the right and left of a decimal point.

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