Question

. Campus bookstores have increased the number of digital textbooks this school year, as
     students weaned on Facebook and iPads seek virtual alternatives to heavy tomes. Digital
     textbooks are projected to account for approximately 13% of course materials sold by the fall
     of 2012, compared with just 3 percent of the $5.85 billion sold last year, according to the
     National Association of College Stores. How accurate is the claim of 13%? Is it too high or
     too low an estimate? In a random sample of 260 college course materials, 15% of the sample
     course materials were digital. But is this sample percentage significant enough to contradict
     the claim that the true population percentage is 13%? (Use a 10% significance level.)

State the PARAMETER

HYPOTHESES

Justify your ASSUMPTIONS

NAME your Test

State your TEST-Statistic

OBTAIN and Interpret your P-value

MAKE a Decision

STATE your Conclusion

Answer 1