Letters / Computer Science Major (junior) wanting to pursue Master's in Business Administration [4]

I am not entirely sure that I would like to pursue a career in computer programming (even though I want to complete my degree in progress) and have taken a turn towards business. I recently started researching graduate school qualifications and I feel almost as clueless as before I started. Do I need professional work experience to be considered for graduate school? My work experience is almost nonexistent and is not professional. I know that grad schools look for evidence of leadership skills. What are some examples of organizations in which I can develop leadership skills? Are sports good? My GPA is not as good as it usually is (3.2/4.0). I am a student of an honors college. I scored a composite 25 on the ACT. Is my ACT score low and should I take the SAT? I feel as though I don't have anything that sets me apart from everyone else. Please help :) My resume is below. Should I include high school honors (MSMS is a school for academically gifted high school juniors and seniors. I was not allowed to attend because it was out of the city and all students were required to live on campus by the way D; ) on my resume and is there anything that I should omit?

EDUCATION:
Jackson State University Major: Computer Science Jackson, MS
Bachelor of Science Cumulative ACT Score: 25 May 2012

Claiborne County Vo-Tech Complex Study: Building Trades Port Gibson, MS
May 2008

SPECIALTIES & SKILLS: Certified in Microsoft Word 2000 by the National Computer Science Academy, WordPress, over 10 years Microsoft Office experience, Crystal Office, basic bookkeeping, Java programming language, MIPS assembly language, Windows operating system, Internet research, 10-key, patience, attention to detail, reliable, able to work in a team environment and work independently, work ethic, problem solving, organization, communication, quick learner

COURSEWORK: Speech Arts, Professional Writing, Calculus, Physics Java, programming language, MIPS assembly language

EXPERIENCE:
Jackson State University Jackson, MS
Fall '10 - March '11 Research Student
Analyzed participants' roles in open source software (OSS) communities using tools such as the R programming language and Structured Query Language (SQL) to perform principal component analysis (PCA), represented data using model-based clustering, wrote research papers, and recorded my progress on a website I co-created with WordPress.

Claiborne County Public Schools Port Gibson, MS
Summer '07 Tutor
Prepared 4th and 5th grade students, including some with special needs, for the Mississippi Curriculum Test, Edition 2 (MCT 2) by giving practice work to reinforce the mathematics and reading/language skills that were presented in the curriculum, reviewed with them, observed their performance, recorded their progress, and supervised them while their teacher was away. The students' comprehension and problem-solving skills improved greatly.

COMMUNITY SERVICE: Tutored Port Gibson, MS elementary school students after school and gave energy efficient light bulbs to Jackson, MS residents.

HONORS & ACTIVITIES: W. E. B. Du Bois Honors College, Who's Who Among American Universities and Colleges, Advertising Committee in Association for Computing Machinery (ACM), accepted into the Mississippi School for Mathematics and Science (MSMS)