# Statistics Essay

3604 words - 15 pages

Question catalogue: Statistics Self-Study Module
Master's programme Media and Communication Science
If you are master student of the master programme “Media and Communication Science” and have to fulfill the additional requirement: Self-Study Module Statistics, you have to answer these list of 42 questions. Please answer the following questions concerning statistical methods in social science briefly. Helpful information concerning the questions can be found in the Reader: “Statistics”. Enjoy yourself while answering the questions. Chapter 1 1. A client rates her satisfaction with her vocational counselor on a 4-point scale from 1 = not at all satisfied to 4 = very satisfied. What is the ...view middle of the document...

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Question catalogue: Statistics Self-Study Module
Master's programme Media and Communication Science
5. Describe the shapes of the three distributions illustrated below.

Chapter 2 6. (a) Describe and explain the differences between the mean, median, and mode. (b) Make up an example (not in the book or in your lectures) in which the median would be the preferred measure of central tendency. 7. (a) Describe the variance and standard deviation. (b) Explain why the standard deviation is more often used as a descriptive statistic. 8. Find the (a) mean, (b) median, (c) sum of squared deviations, (d) variance, and (e) standard deviation. In the following list of numbers: 3.0; 3.4; 2.6; 3.3; 3.5; 3.2; A developmental psychologist studies the number of words seven infants have learned at a particular age. The numbers are: 10, 12, 8, 0, 3, 40, and 18. Figure the (a) mean, (b) median, and (c) standard deviation for the number of words learned by these seven infants. (d) Explain what you have done and what the results mean to a person who has never had a course in statistics.

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10. A person scores 81 on a test of verbal ability and 6.4 on a test of quantitative ability. For the verbal activity test, the mean for people in general is 50 and the standard deviation is 20. For the quantitative ability test, the mean for people in general is 0 and the standard deviation is 5. Which is the person’s stronger ability: verbal or quantitative? Explain your answers to a person who has never had a course in statistics.

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Question catalogue: Statistics Self-Study Module
Master's programme Media and Communication Science
Chapter 3

11. For each of the following scatter diagrams, indicate whether the pattern is linear, curvilinear, or no correlation; if it is linear, indicate whether it is possible or negative and approximately how strong the correlation is.

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As part of a larger study, Speed and Gangestad (1997) collected ratings and nominations on a number of characteristics for 66 fraternity men from their fellow fraternity members. The following paragraph is taken from their “Results” section: “…men’s romantic popularity significantly correlated with several characteristics: best dressed ( r = .47), most self-confident (r = . 48), best trendsetters (r = .38), funniest (r = 37), most satisfied (r = .32), and most independent (r = .28). Unexpectedly, however, men’s potential for financial success did not significantly correlate with romantic popularity (r = .10). (p. 931)” Explain these results as if you were writing to a person who has never had a course in statistics. Specifically, (a) explain what is meant by a correlation coefficient using one of the correlations as an example; (b) explain in a general way what is meant by “significantly” and “not significantly”, referring to at least one specific example; and (c) speculate on the meaning of the pattern of results, taking into account the issue of direction of causality.

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