Use the Empirical Rule to Solve the Problem

question 88

Multiple Choice

Use the empirical rule to solve the problem.
-The amount of Jen's monthly phone bill is normally distributed with a mean of $78 and a standard deviation of $8. Fill in the blanks.
68.26% of her phone bills are between $___ and $___.

• A)70, 86
• B)62, 78
• C)78, 86
• D)62, 94

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Definitions:

Atomic

Constituting an undivided whole; elementary, with reference to particles or concepts.

Truth-functional Compound

A complex proposition in logic that is made up of simpler propositions and whose truth-value depends solely on the truth-values of these simpler propositions.

Quantifier

In logic, symbols that specify how many objects in the universe of discourse satisfy a given condition.

Atomic Open Sentence

An expression containing a variable that becomes either true or false when a value is substituted for the variable.