9/24/2016 Quiz: CH. 3 ASSIGNMENT CH. 3 ASSIGNMENT Started: Sep 19 at 8:49am Quiz Instructions You have all week to work on this assignment. Please get started early, you may print, and then submit the answers when you are ready. All work must be submitted by close of Sunday. Question 1 1 pts Data Set 31 A student was interested in the structure of the families in the U.S. He sampled 29 of his 330 classmates asking the question, "How many children are there in your family?" He compiled the answers into a simple frequency distribution: x f 7 5 4 3 2 1 1 2 3 6 10 7 Refer to Data Set 31. The mode is 10 8 7 2. Question 2 1 pts Data Set 32 5, 5, 1, 4, 4, 5 The mean of Data Set 32 is 5 https://csn.instructure.com/courses/1279162/quizzes/1771005/take 1/9 9/24/2016 Quiz: CH. 3 ASSIGNMENT 4.5 4 24. Question 3 1 pts Data Set 34 The descriptive statistics for these data are approximately the same as those of a freshman class at a small liberal arts college. ACT Scores x f 34 29 25 24 23 22 15 1 1 3 3 5 3 1 The mean of Data Set 34 is 24.9 58.0 25.4 23.9. Question 4 1 pts Data Set 34 The descriptive statistics for these data are approximately the same as those of a freshman class at a small liberal arts college. ACT Scores x f 34 29 25 24 1 1 3 3 https://csn.instructure.com/courses/1279162/quizzes/1771005/take 2/9 9/24/2016 Quiz: CH. 3 ASSIGNMENT 23 22 15 5 3 1 The median of Data Set 34 is 8.5 17 23 24. Question 5 1 pts Data Set 34 The descriptive statistics for these data are approximately the same as those of a freshman class at a small liberal arts college. ACT Scores x f 34 29 25 24 23 22 15 1 1 3 3 5 3 1 The mode of Data Set 34 is 3 5 22 23. Question 6 https://csn.instructure.com/courses/1279162/quizzes/1771005/take 1 pts 3/9 9/24/2016 Quiz: CH. 3 ASSIGNMENT Data Set 35 5, 1, 2, 1, 1, 5 The median for Data Set 35 is 1 1.5 2 15. Question 7 1 pts The U.S. Department of Agriculture reported the total number of bushels harvested of corn, soybeans, wheat, rice, and oats. This is a frequency distribution of a ____ variable the proper measure of central tendency is a ____. nominal mode ordinal mode nominal median ordinal median. Question 8 1 pts If the mean of 7, 4, 4 is 5.0 and the mean of 14, 3, 7, 4 is 7.0, the weighted mean is 6.0 21.5 4 none of the other alternatives are correct. https://csn.instructure.com/courses/1279162/quizzes/1771005/take 4/9 9/24/2016 Quiz: CH. 3 ASSIGNMENT Question 9 1 pts The mean of 2, 3, and 4 is 3.0. The mean of 5, 6, 7, 8, and 9 is 7.0. The weighted mean is 5.0 4.5 5.5 none of the other alternatives are correct. Question 10 1 pts Three samples with N's of 5, 5, and 10 produced sample means of 2, 3, and 4 respectively. The weighted mean is 6.67 3.00 3.25 3.50. Question 11 1 pts Measures of central tendency are measures of distance. location. deviation. extremes. Question 12 1 pts The mode is defined as https://csn.instructure.com/courses/1279162/quizzes/1771005/take 5/9 9/24/2016 Quiz: CH. 3 ASSIGNMENT the most frequently occurring score. the mathematical center of the distribution. the smallest deviation from the mean. the point at or below which 50% of the scores fall. Question 13 1 pts Which measure of central tendency should a researcher use to describe the sex of participants in a study? the mean the median the mode the deviation Question 14 1 pts The mode is the appropriate measure of central tendency when the scale of measurement is nominal. ordinal. interval. ratio. Question 15 1 pts The median is defined as the most frequently occurring score. the mathematical center of the distribution. https://csn.instructure.com/courses/1279162/quizzes/1771005/take 6/9 9/24/2016 Quiz: CH. 3 ASSIGNMENT the smallest deviation from the mean. the score at the 50th percentile. Question 16 1 pts The mean is defined as the most frequently occurring score. the score located at the mathematical center of the distribution. the smallest deviation from the center score. the point at or below which 50% of the scores fall. Question 17 1 pts Find the median of the following data set (that is, the middle score). 2, 2, 3, 4, 4, 4, 4, 4, 5, 5, 6, 7, 7, 7, 8, 8, 9 5 4 5.24 7 Question 18 1 pts Find the median score in the following frequency distribution. Score f 9 2 8 4 7 8 6 6 5 4 4 3 https://csn.instructure.com/courses/1279162/quizzes/1771005/take 7/9 9/24/2016 Quiz: CH. 3 ASSIGNMENT 3 2 8 7 6.21 6 Question 19 1 pts Find the mean of the scores in the following frequency distribution. Remember the f column indicates the number of times each score occurred in the original data set. Score f 9 2 8 4 7 8 6 6 5 4 4 3 3 2 8 7 6.21 6 Question 20 1 pts For the following order of the measures of centrality, what shape best describes the associated distribution? https://csn.instructure.com/courses/1279162/quizzes/1771005/take 8/9 9/24/2016 Quiz: CH. 3 ASSIGNMENT Quiz saved at 12:18pm https://csn.instructure.com/courses/1279162/quizzes/1771005/take Submit Quiz 9/9