Unit 2 Assignment Started: Aug 31 at 4:04pm Quiz Instructions Please choose one response for each question. There are 30 questions, and there is no time limit. There are no retakes. You will be able to see the correct answers, but these will only be available until a week after the quiz (assignment) is due. Question 1 1 pts Here are some data: 12, 23, 11, 7, 2, 6.5, 12 What is the median? Less than 8.50 More than 11.50 Between 9.51 and 10.50 Between 10.51 and 11.50 Between 8.51 and 9.50 Question 2 1 pts Here are some data: 12, 23, 11, 7, 2, 6.5, 12 What is the mode? Less than 8.50 Between 9.51 and 10.50 Between 8.51 and 9.50 More than 11.50 Between 10.51 and 11.50 Question 3 Here are some data: 12, 23, 11, 7, 2, 6.5, 12 1 pts What is the rst quartile? More than 7.00 Between 4.01 and 5.00 Between 6.01 and 7.00 Less than 4.00 Between 5.01 and 6.00 Question 4 1 pts Here are some data: 12, 23, 11, 7, 2, 6.5, 12 What is the third quartile? Between 8.51 and 9.50 Less than 8.50 Between 10.51 and 11.50 More than 11.50 Between 9.51 and 10.50 Question 5 Here are some data: 12, 23, 11, 7, 2, 6.5, 12 What is the interquartile range (IQR)? Between 4.51 and 5.50 More than 7.50 Between 6.51 and 7.50 Between 5.51 and 6.50 Less than 4.50 1 pts Question 6 1 pts Here are some data: 12, 23, 11, 7, 2, 6, 12 Which number(s) is(are) potential outlier(s) based on the 1.5*IQR rule? 2, 6.5 2 There are no potential outliers 23 12, 23 Question 7 1 pts Here are some data: 12, 23, 11, 7, 2, 6.5, 12 What is the mean? Between 9.51 and 10.50 Less than 8.50 Between 8.51 and 9.50 Between 10.51 and 11.50 More than 11.50 Question 8 I would prefer to be a: (Please note that you don't have the option to NOT be a mole-rat or cartoon walrus.) mole-rat 1 pts either, but I don't want full credit either, but I want full credit cartoon walrus Question 9 1 pts Here are some data: 12, 23, 11, 7, 2, 6.5, 12 What is the variance? Less than 10 Between 30 and 39 More than 39 Between 10 and 19 Between 20 and 29 Question 10 1 pts Here are some data: 12, 23, 11, 7, 2, 6.5, 12 What is the standard deviation for this sample? Between 5.51 and 6.50 Between 4.51 and 5.50 Between 6.51 and 7.50 Less than 4.50 More than 7.50 Question 11 Here are some data: 16; 17; 19; 22; 22; 22; 22; 22; 23 1 pts The data are ___________. (You may want to construct a gure to answer this question.) skewed to the right skewed to the left symmetrical Question 12 1 pts Here is a density plot. How many modes are visible? one four three two impossible to tell Question 13 Here is a density plot. Is the distribution of education skewed? If so, which way? 1 pts left skew right skew no skew--this distribution is symmetrical it's impossible to tell Question 14 1 pts Describe the shape of this distribution. skewed to the left skewed to the right symmetrical Question 15 Below is a frequency distribution graph. What is the mode? 1 pts 7 6 3 4 5 Question 16 1 pts Below is a frequency distribution graph. What is the mean? Less than 3.00 Between 3.01 and 4.00 Between 5.01 and 6.00 Between 4.01 and 5.00 More than 6.00 Question 17 Kurtosis is a measure of ___________. 1 pts whether data are unimodal or bimodal (i.e., one or two modes) central tendency left skew whether data are symmetrical right skew Question 18 1 pts If the data are skewed to the left, then which of the following relationships is true? the mean is greater than the median the mean is equal to the median the mean is less than the median Question 19 1 pts If the data are skewed to the right, then which of the following relationships is true? the mean is equal to the median the mean is greater than the median the mean is less than the median Question 20 If the data are perfectly symmetrical, then which of the following relationships is true? the mean is less than the median the mean is greater than the median the mean is equal to the median 1 pts Question 21 1 pts The following graph displays the heights of 100 male semiprofessional soccer players on the x-axis and the relative frequency of the y-axis. Such a graph is called a ________. stemplot histogram box plot frequency polygon Question 22 Here is a stemplot. What is the median of this sample? Stem Stem Leaf 2 57 3 3444 4 015 5 003 Between 30.01 and 32.00 Between 32.01 and 34.00 1 pts Between 34.01 and 36.00 More than 36.00 Less than 30.00 Question 23 1 pts Here is a stemplot. What is the mean of this sample? Stem Stem Leaf 2 57 3 3444 4 015 5 003 Between 32.01 and 34.00 Less than 32.00 More than 38.00 Between 36.01 and 38.00 Between 34.01 and 36.00 Question 24 Here is a stemplot. What is the standard deviation of this sample? Stem Stem Leaf 2 57 3 3444 4 015 1 pts 5 003 Between 9.01 and 10.00 More than 11.00 Between 8.01 and 9.00 Less than 8.00 Between 10.01 and 11.00 Question 25 1 pts In a survey, 40 people were asked how many times they visited a store before making a major purchase. The data are graphed below in a line graph. What is the mode? 3 5 4 2 1 Question 26 The standard deviation measures _________. the interquartile range of the data 1 pts the spread of the data the skewness of the data the center of the data Question 27 1 pts Which one of the following graphs is NOT used as a technique to describe data? histogram frequency polygon bar graph line graph all of the above can be used to describe data Question 28 1 pts Data are plotted in the following box plot. What are the median, rst quartile, and third quartile? 4, 3, 5 3, 2, 5 3, 2, 4 none of the above 4, 2, 5 Question 29 1 pts Data are plotted in the following box plot. These data are number of days people take sick leave every quarter. The box plot shows that the middle 50% of sick days per quarter are from ______ days to ________ days. 3, 5 3, 9 2, 9 2, 5 none of the above Question 30 1 pts Sixty-ve randomly selected car salespersons were asked the number of cars they generally sell in one week. Fourteen people answered that they generally sell three cars; nineteen generally sell four cars; twelve generally sell ve cars; nine generally sell six cars; eleven generally sell seven cars. If one uses the following graph to illustrate the data, the graph is referred to as ________. stemplot histogram frequency polygon box plot No new data to save. Last checked at 4:04pm Submit Quiz 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. D D C D A D A D C C B A A B C D D C B C B D C A A B E A A B