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Discussion Assignment Instructions

Discussion Thread: Descriptive Statistics, Ordinal Scale and Dichotomous Variable

Read: Morgan, Leech, Gloeckner, & Barrett: Chapters 4

Read: Keller: Introduction – Part III

Watch: Inferential Statistics

In the thread for each short-answer discussion the student will post short answers to the prompted questions. The answers must demonstrate course-related knowledge and support their assertions with scholarly citations in the latest APA format (7th Edition). Minimum word count for all short answers cumulatively is 700 words.

Respond to the following short answer questions from Chapter 4 in the Morgan, Leech, Gloeckner, & Barrett textbook:

D3.4.1 Using Outputs 4.1a and 4.1b: (a) What is the mean visualization test score? (b) What is the skewness statistic for math achievement test? What does this tell us? (c) What is the minimum score for mosaic pattern test? How can that be?

D3.4.2.Using Output 4.1b: (a) For which variables that we called scale, is the skewness statistic more than 1.00 or less than –1.00? (b) Why is the answer important? (c) Does this agree with the boxplot for Output 4.2? Explain.

D3.4.3.Using Output 4.2b: (a) How many participants have missing data? (b) What percent of students have a valid (non-missing) motivation scale or competence scale score? (c) Can you tell from Outputs 4.1 and 4.2b how many are missing both motivation scale and competence scale scores? Explain.

D3.4.4.Using Output 4.4: (a) Can you interpret the means? Explain. (b) How many participants are there altogether? (c) How many have complete data (nothing missing)? (d) What percent are in the fast track? (e) What percent took algebra 1 in h.s.?

D3.4.5.Using Output 4.5: (a) 9.6% of what group are Asian-Americans? (b) What percent of students have visualization 2 scores of 6? (c) What percent had such scores of 6 or less?

For each thread the student must include

– a title block with your name, class title, date,

– and the discussion forum number;

– write the question number and the question title as a level one heading (e.g. D1.1 Variables)

– and then provide your response; use Level Two headings for multi part questions (e.g. D1.1 & D1.1.a, D1.1.b, etc.),

– Conclusion

– and include a reference section (minimum 6).