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PSY/SOC 3010 Statistics Take Home Test 1 - Document preview page 1

PSY/SOC 3010 Statistics Take Home Test 1 - Page 1

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PSY/SOC 3010 Statistics Take Home Test 1

A take-home test in statistics for psychology and sociology students, focused on core statistical concepts.

Benjamin Fisher
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PSY/SOC 3010 Statistics Take Home Test 1 - Page 1 preview imagePSY/SOC 3010Statistics Take Home Test 1Statistics Take Home Test 1PSY/SOC 3010Part A Instructions:Answer the following multiple choice questions by circlingthe correct answer.1. In an experiment, a variable that differs in amount is called aa. qualitative variableb. quantitative variablec. independent variabled. statistical variableAnswer:b. quantitative variable2. A researcher is interested in studying hand-eye coordination of second-grade boys at HoneyIsland Elementary School. She selects 4 boys for study, measures them by having themshoot free throws and finds that they all receive the same score. In this study hand-eyecoordination as measured by the number of free throws is measure on:a. a nominal scaleb. a ordinal scalec. an interval scaled. a ratio scaleAnswer:d. a ratio scale3. A researcher measures “race” on a questionnaire by having respondents indicate their racebased on five options. This variable would be measured on:a. a ratio scaleb. a continuous variablec. a dichotomous variabled. a discrete variableAnswer:d. a discrete variable4. When creating a grouped interval, frequency distribution table, a researcher should includeapproximately _______ class intervals.a. 5-15b. 1-5c. 15-20d. as many as the researcher wantsAnswer:a. 5-155. A researcher creates a grouped interval, frequency distribution table using an interval size ofthree, and 19 is the lowest score in the sample. According to our guidelines, _______ would be
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PSY/SOC 3010 Statistics Take Home Test 1 - Page 2 preview image
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PSY/SOC 3010 Statistics Take Home Test 1 - Page 3 preview imagethe best choice for the bottom interval.a. 19-22b. 19-21c. 10-20d. 18-20Answer:b. 19 216. When making a frequency table, the first column shoulda. include all observed values, starting from the highest and ending with the lowestb. include all possible values, starting with the lowest and ending with the highestc. begin with 0% at the top and go down to 100% at the bottomd. none of the aboveAnswer:b. include all possible values, starting with the lowest and ending with thehighestFor questions 7-9 use the following frequency table:Scoref1521431341231127. What is the “n” for the above frequency distribution?a. 4b. 14c. 20d. 65Answer:c. 208. What is the sum of all the scores in the above frequency table?a. 20b. 65c. 182d. 270Answer:b. 659. The score of 14 would have a cumulative frequency ofa. 5b. 14c. 12d. 3Answer:c. 1210. In a frequency polygon, the vertical axis representsa. possible values the variable can take
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PSY/SOC 3010 Statistics Take Home Test 1 - Page 4 preview imageb. intensity of the histogramc. mean scored. none of the aboveAnswer:b. intensity of the histogram11. In terms of skewness, the normal bell-shaped curve isa. positively skewedb. negatively skewedc. not skewed at alld. mesokurticAnswer:c. not skewed at all12. A statistics instructor collects data on the test scores of students in an introductory statisticsclass and discovers that most students did very poorly and only a few did well (including a fewwho did very well). How would the instructor describe the distribution of test scores?a. symmetricalb. negatively skewedc. having a floor effectd. positively skewedAnswer:b. negatively skewed13. Which of the following is true if a distribution is positively skewed?a. mode > median > meanb. mode < median < meanc. median > mode > meand. median = mean = modeAnswer:b. mode < median < mean14. Based on the scores 2, 10, 3, 6, 2, 2, 6, 1, 2, and 6, a score of 4 is the:a. modeb. medianc. meand. rangeAnswer:c. mean15. The highest point of the curve in a distribution of scores is most closely associatedwitha. the meanb. the medianc. the moded. the standard deviationAnswer:c. the mode16. A sociologist finds that the number of things a group of twelve children can name are 3, 3, 3,
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