A researcher measures the amount of coffee consumed by college students while studying during the final exam week.In her study,she found that students drink 2.3 ± 0.8 (M ± SD)cups of coffee per study session.Assuming the data are normally distributed,which of the following is the most appropriate conclusion?
A) The average student drinks less than 2.3 cups of coffee per study session.
B) Most students drink between 1.5 and 3.1 cups of coffee per study session.
C) Most students drink between 2.3 and 3.9 cups of coffee per study session.
D) Most students drink between 0 and 2.3 cups of coffee per study session.

Question

Quizplus · Accepted Answer

Since the data is normally distributed, we can use the rule that approximately 68% of the data falls within one standard deviation of the mean. Thus, in this case, we can say that most students (68%) drink between 1.5 (2.3 - 0.8) and 3.1 (2.3 + 0.8) cups of coffee per study session. Therefore, the most appropriate conclusion is B - "Most students drink between 1.5 and 3.1 cups of coffee per study session."

A Researcher Measures the Amount of Coffee Consumed by College