A high school physics teacher wondered if his students in the senior class this year will be more likely to go into STEM (Science, Technology, Engineering, Mathematics) majors than Social Science and Liberal Arts majors. He asked each of his 72 students about their first choice for major on their college applications and conducted a Chi-square test for goodness of fit with an alpha level of .05 to see if the number of students choosing each category differs significantly.

• 20 - STEM
• 18 - Social Sciences
• 34 - Liberal Arts

Select the correct written null and alternative hypotheses below.

1. Null: The different types of majors are not equally popular among the students.

Alternative: The different types of majors are equally popular among the students.

2. Null: College majors differ significantly.

Alternative: College majors do not differ significantly.

3. Null: College majors do not differ significantly.

Alternative: College majors differ significantly.

4. Null: The different types of majors are equally popular among the students.

Alternative: The different types of majors are not equally popular among the students.