HW Week 1.docx

# HW Week 1.docx - UMUC STAT-200 Homework Assignments Dr...

• Homework Help
• 4

This preview shows pages 1–2. Sign up to view the full content.

UMUC STAT-200 Homework Assignments Week #1 Dr. Brian Killough Textbook #1: Lane et al . Introduction to Statistics, David M. Lane et al., 2013. ( ) Textbook #2: Illowsky et al . Introductory Statistics, Barbara Illowsky et al., 2013. ( ) Lane - Chapter 1: 3,10,17,18 3. If you are told only that you scored in the 80th percentile, do you know from that description exactly how it was calculated? Explain. Yes, using the formula R=P/100 x (N+1) . After this step, if the number given is not an integer, you calculate further by finding the scores of rank IR and rank IR+1, find the difference between the 2, multiply by FR then add to rank IR. 10. For the numbers 1, 2, 4, 16, compute the following: ΣX, ΣX 2 , and (ΣX) 2 EX= 23 EX^2= 277 (EX)^2=529 For #17 and #18 see the ADHD Treatment Case Study (Page 624, ) 17. What is the independent variable of this experiment? How many levels does it have? The independent variable is the amount of dosage given to the children; there are 4 different levels, counting the placebo.

This preview has intentionally blurred sections. Sign up to view the full version.

This is the end of the preview. Sign up to access the rest of the document.
• Fall '09
• Chief Executive Officer, relative frequency, Lake Tahoe Community, Lake Tahoe

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern