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:

Internet During Class

The use of the internet by students for non-educational purposes during class times, which can be a distraction and hinder learning.

Research Results

The findings or outcomes derived from systematic investigation aimed at discovering new knowledge or understanding.

Taking Notes

The act of writing down important information from a verbal instruction, lecture, or reading material for future reference.

Long-term Storage

The process and capability of retaining information in the brain or a digital device for extended periods of time.