Interpret the Level of Statistical Significance for the Event Described

question 112

Multiple Choice

Interpret the level of statistical significance for the event described.
-A study of students taking Statistics 101 was done. 500 students who studied for more than 10 hours averaged a B. 250 students who studied for less than 10 hours averaged a C. This difference was significant at the 0.01 Level. What does this mean?

• A)There is not enough information to make any conclusion.
• B)The probability that the difference was due to chance alone is greater than 0.01.
• C)The improvement was due to the fact that more people studied.
• D)There is less than a 0.01 chance that the grades were better by chance alone.

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