A researcher is interested in determining the proportion of rst year university students who have suffered hearing loss from loud music and other big-city sounds. How many students should she give hearing tests to, in order to determine this proportion with a margin of error (half width of condence interval) of 0.14 using a 95% condence interval? a.) If she believes from previous studies that the true proportion is 0.25. (Give answer as a whole number ) C] i'' Tries 0/5 b.) If she has no idea of the proportion with hearing loss. (Give answer as a whole number.) [:l #2355: Tries 0/5