Stats Exam 2

Stats Exam 2 - Introduction to Social Statistics SOCY 2061...

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Introduction to Social Statistics     University of Colorado –  Boulder SOCY 2061     Monday, June 11,  2007 Exam 2 Name _________________________ This exam is worth 10% of your course grade.  The exam consists of 64 questions. Each correct response  is worth 1 point, except for the last, which is worth 2 pts. Partial credit is awarded when appropriate. For numbers 1-9, name the descriptive statistics used for describing the following aspects of a data set. Central Tendency Dispersion Shape Bivariate Relationships 1.   Mean 4.   Standard Deviation 7.   Skew 9.   Correlation  Coefficient 2.   Median 5.   Variance 8.   Kurtosis * 3.   Mode 6.   Range * * 10. Which of the following is the correct formula for calculating the mean? A. Σ X +  n B. Σ X / X C. Σ X /  n D. Σ X + X 11. When using the AVERAGE function in  Excel , which of the following statistics are you calculating? A. Sum B. Mean C. Mode D. Median 12. If you wanted to identify the point in a distribution at which 50% of scores fall above and 50% fall below a  given score, which measure of central tendency would you report? A. Average B. Mean C. Mode D. Median 13. If you wanted to identify the most frequently occurring score in a distribution, which measure of central  tendency would you report?
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Name ________________________ A. Average B. Mean C. Mode D. Median 14. In the formula for computing the mean, what does the letter “x” represent? A. Summation B. Sample size C. Mean value of the group D. Individual scores Page total _____  15. In the formula for computing the mean, what does the letter “n” represent? A. Summation B. Sample size C. Mean value of the group D. Individual scores 16. What is the median of the following set of scores? 10, 15, 12, 18, 16, 12 A. 12.5 B. 13 C. 13.5 D. 15 17. What is the mean of the following set of scores? 10, 15, 12, 18, 19, 16, 12 A. 12.1 B. 15.7  C. 16.8 D. 14.6 For numbers 18-20, label each of the lines with name of the statistic of central tendency. 18. ___Mode _____ 19. ____Median _______ 20. _____Mean  (18)       (19) (20) Page total _________ Page 2 of 10
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Name ________________________ 21. What is the term used to describe scores that are at the extreme ends of the distribution? A. Variability B. Outliers C. Skew D. Percentile 22. In the formula for computing the standard deviation, what does the term  (X i  - f8e5 X)  represent?
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This note was uploaded on 04/28/2008 for the course SOCY 2061 taught by Professor Johnson,aa during the Summer '07 term at Colorado.

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Stats Exam 2 - Introduction to Social Statistics SOCY 2061...

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