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Week 3 Math 225n Statistics Quiz, week 3 quiz with correct answers provided

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Week 3 Distribution Shape If the median of a data set is 13 and the mean is 13, which of the following is most likely? Perfect. Your hard work is paying off � The data are skewed to the left. The data are skewed to the right. The data are symmetrical. Which of the following box-and-whisker plots shows a skewed data set? Select all answers that apply. Well done! You got it right.  A horizontal box-and-whisker plot is above a horizontal axis labeled from 0 to 16 in increments of 2. The box-and-whisker plot has the following five-number summary: 1, 3, 4, 6, and 15. All values are approximate. The part of the box at point 4 is represented with a dotted line.   A horizontal box-and-whisker plot is above a horizontal axis labeled from 0 to 20 in increments of 5. The box-and-whisker plot has the following five-number summary: 4, 14, 16, 19, and 20. All values are approximate. The part of the box at point 16 is represented with a dotted line.  Which of the following box-and-whisker plots shows a skewed data set? Select all answers that apply. Well done! You got it right.    A horizontal box-and-whisker plot is above a horizontal axis labeled from 0 to 20 in increments of 5. The box-and-whisker plot has the following five-number summary: 4, 14, 16, 19, and 20. All values are approximate. The part of the box at point 16 is represented with a dotted line.   Which of the following histograms shows a skewed data set?   Perfect. Your hard work is paying off �   Correct answer: A, and B   A histogram has a horizontal axis labeled Values from negative 2 to 10 in increments of 2 and a vertical axis labeled Frequency from 0 to 300 in increments of 50. The histogram has vertical bars of width 1, starting at the horizontal axis value of negative 0.5. The approximate heights of the bars are as follows, where the horizontal axis label is listed first and the approximate height is listed second: negative 0.5, 40; 0.5, 140; 1.5, 225; 2.5, 270; 3.5, 175; 4.5, 95; 5.5, 35; 6.5, 20.  Which of the following frequency tables show a skewed data set? Select all answers that apply. Correct answer: Value Frequency 0 2 1 11 2 30 3 22 4 15 5 12 6 6 7 1 8 1 Value Frequency 13 1 14 6 15 9 16 15 17 27 18 28 19 10 20 4 If the median of a data set is 13 and the mean is 23, which of the following is most likely? The data are skewed to the right. Which of the following frequency tables shows a skewed data set? Select all answers that apply. Which of the following lists of data has the smallest standard deviation? 16, 12, 13, 16, 14, 15, 16, 14, 14, 13 Which of the data sets represented by the following histograms has the smallest standard deviation? Correct answer:

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