Umuc Stat 200 All Week Homework-Latest 2015 November

UMUC STAT 200 All Week Homework-Latest 2015 November

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Question UMUC STAT-200 Homework Assignments Week #1

Dr. Brian Killough

Textbook #1: Lane et al. Introduction to Statistics, David M. Lane et al., 2013.

( http://onlinestatbook.com/Online_Statistics_Education.pdf)

Textbook #2:Illowskyet al. Introductory Statistics, Barbara Illowsky et al., 2013. ( http://openstaxcollege.org/files/textbook_version/hi_res_pdf/15/col11562-op.pdf)

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.

10. For the numbers 1, 2, 4, 16, compute the following:ΣX,ΣX2, and (ΣX)2

For #17 and #18 see the ADHD Treatment Case Study

(Page 624, http://onlinestatbook.com/2/case_studies/adhd.html)

17. What is the independent variable of this experiment? How many levels does it have?

18. What is the dependent variable? On what scale (nominal, ordinal, interval, ratio) was it measure

Illowsky – Chapter 1: 50,52,72,80,84,90

Use the following information to answer #50 and #52:

A Lake Tahoe Community College instructor is interested in the mean number of days Lake Tahoe Community College math students are absent from class during a quarter.

50. What is the population she is interested in?

a. all Lake Tahoe Community College students

b. all Lake Tahoe Community College English students

c. all Lake Tahoe Community College students in her classes

d. all Lake Tahoe Community College math students

52. The instructor’s sample produces a mean number of days absent of 3.5 days. This value is an example of a:

a. parameter.

b. data.

c. statistic.

d. variable.

72. A study was done to determine the age, number of times per...