5.71 Student Fees A student union states that 80% of all students favour an increase in student fees to subsidize a new recreational area. A random sample of n = 25 students produced 15 in favour of increased fees. What is the probability that 15 or fewer in the sample would favour the issue if the student union is correct? Do the data support the student union's asser- tion, or does it appear that the percentage favouring an increase in fees is less than 80%?