Answer:
1, 2, and 4 are True.
Explanation:
(1)The proportion of 8th graders who prefer unflavored water (0.30) is greater than those who prefer flavored water (0.25). Therefore, most 8th graders prefer unflavored water.
The first statement is True
(2)The proportion of 7th graders who prefer flavored water (0.30) is greater than those who prefer unflavored water (0.15). Therefore, most 7th graders prefer flavored water than prefer unflavored water.
The second statement is True
(4)From the table, there is no evidence to show an association between a students' grade level and their water preference.
The fourth statement is True.