A Study of Students Taking Statistics 101 Was Done

question 1

Multiple Choice

A study of students taking Statistics 101 was done. Four hundred students who studied for more than 10 hours averaged a B. Two hundred 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) The probability that the difference was due to chance alone is greater than 0.01.
• B) There is less than a 0.01 chance that the first group's grades were better by chance alone.
• C) The improvement was due to the fact that more people studied.
• D) There is not enough information to make any conclusion.

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