2. Face in Class Books In a 2012 Washington Post article entitled "Is College Too Easy? As Study Time Falls, Debate Rises," Daniel de Vise reports that "over the past half-century, the [average] amount of time college students actually study-read, write, and otherwise prepare for class-has dwindled from 24 hours a week to about 15 ...." No standard deviation is given, but let's assume that standard deviation is 2.5 hours. a. Suppose a college student is selected at random. Use the empirical rule to estimate how likely it is that this student studies between 10 and 17.5 hours per week. i. About 50% of the time ii. About 81.5 chances in 100 iii. About 13.5 chances in 100 iv. About 2.5 chances in 100 132 Beyond the Numbers: A Student-Centered Approach for Learning Statistical ReasoningChapter 6 | Confidence Intervals: Where They Come From b. Suppose a college student is selected at random. Use the empirical rule to estimate how likely it is that this student studies between 17.5 and 20 hours per week. i. About 50% of the time ii. About 81.5 chances in 100 iii. About 13.5 chances in 100 iv. About 2.5 chances in 100 c. Suppose a college student is selected at random. Use the empirical rule to estimate how likely it is that this student studies more than 20 hours per week. i. About 50% of the time ii. About 81.5 chances in 100 iii. About 13.5 chances in 100 iv. About 2.5 chances in 100