Past Experience Indicates That the Variance in the Time It

question 37

Multiple Choice

Past experience indicates that the variance in the time it takes for a "fast lube" operation to actually complete the lube and oil change for customers is 9.00 minutes. The manager wishes to estimate the mean time with 99 percent confidence and a margin of error of ± 0.50 minutes. Given this, what must the sample size be?

• A) n = 239
• B) n = 2149
• C) n = 139
• D) n = 1245

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Definitions:

King

A male monarch or a supreme ruler of a kingdom, traditionally inherited by birthright or lineage.

Probability Calculus

A branch of mathematics that deals with calculating the likelihood of different possible outcomes.

Negation

The logical operation that takes a proposition to its opposite in truth value, from true to false and vice versa.

Event

An occurrence or happening, particularly one of significance, that can be distinctly identified in time and space.