Suppose the Proportion of Sophomores at a Particular College Who $\mathrm { p } _ { \mathrm { s } } = \mathrm { pf } _ { \mathrm { f } } \text { to be } ( 0.239,0.429 )$

Essay

Suppose the proportion of sophomores at a particular college who purchased used textbooks in the past year is ps and the proportion of freshmen at the college who purchased used textbooks in the past year is pf. A study found a 90% confidence interval for $\mathrm { p } _ { \mathrm { s } } = \mathrm { pf } _ { \mathrm { f } } \text { to be } ( 0.239,0.429 )$ Does this interval suggest that sophomores are more likely than freshmen to buy used textbooks? Explain.