Let ( p ) denote the proportion of students at a large university who plan to purchase a campus meal plan in the next academic year. For a large-sample ( z ) test of ( Hâ‚€:p=0.20 ) versus ( H_a:p<0.2 ), the null hypothesis is that:
a) ( p ) is less than 0.20
b) ( p ) is equal to 0.20
c) ( p ) is greater than 0.20
d) ( p ) can be any value
