A 50-Volt Battery Must Be Between 55 and 45 Volts

question 10

Multiple Choice

A 50-volt battery must be between 55 and 45 volts when it leaves the factory. Two hundred samples of batteries have yielded the following data: average charge of 49 volts with a standard deviation of 2.5 volts. What is the probability of producing an out-of-spec battery?

• A) 0.06
• B) 0.80
• C) 0.53
• D) 0.12
• E) 0.32

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