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A New Extended-Life Light Bulb Has an Average Life of 750

question 36

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A new extended-life light bulb has an average life of 750 hours,with a standard deviation of 50 hours. If the life of these light bulbs approximates a normal distribution,about what percent of the distribution will be between 600 hours and 900 hours?


Definitions:

Real Number Line

A line that graphically represents all real numbers in a continuous sequence, with points corresponding to numbers.

Real Number Line

A line that graphically represents the set of all real numbers, where each point on the line corresponds to a unique real number.

Even Integers

Whole numbers that are exactly divisible by 2, with no remainder.

Real Number Line

A line that graphically represents all real numbers, including integers, fractions, and irrational numbers.

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