Find the Number of Standard Deviations from the Mean

question 120

Multiple Choice

Find the number of standard deviations from the mean. Round your answer to two decimal places.
-The number of hours per day a college student spends on homework has a mean of 4 hours and a standard deviation of 0.75 hours. Yesterday she spent 3 hours on homework. How many standard deviations from the mean is that?

• A) 1.33 standard deviations below the mean
• B) 0.67 standard deviations above the mean
• C) 0.67 standard deviations below the mean
• D) 1.33 standard deviations above the mean

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Definitions:

ABS Circuits

Electrical circuits within the Anti-lock Braking System that control the release and application of brakes to prevent wheel lockup.

Start-up Self Test

A diagnostic routine performed by electronic systems in vehicles and other devices upon start-up to ensure all components and functions are operating correctly.

4S/4M ABS

The 4S/4M ABS refers to a four-sensor, four-modulator configuration in an Anti-lock Braking System, improving safety by managing wheel slip during braking in heavy vehicles.