Sophia __ Intro to Stats Unit 2 Milestone 2_With Complete Solutions_GRADED A+

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UNIT 2 — MILESTONE 2 Score 24/26 You passed this Milestone 24 questions were answered correctly. 2 questions were answered incorrectly. 1 In which of these cases should the median be used? Wh... en the data has small variance When data has no outliers When the data has extreme values When the data has nominal values RATIONALE Since the mean uses the actual values in the data, it is most affected by outliers and skewness. So, we only want to use the mean when the data is symmetric as a measure of centrality. When the data is skewed or has extreme values, the median is a better measure since it is not as sensitive to these values. CONCEPT Measures of Center 2 Consider the times (in seconds) that it took children and adults to solve a Rubik’s cube at a competition.What does the circled section represent? 21 children completed the Rubik's cube in 7 minutes. One child solved the Rubik's cube in 21.7 seconds. One child took 72 seconds to solve the Rubik's cube, while another took 71 seconds to solve it. 21 children completed the Rubik's cube in 7 seconds. RATIONALEIf we recall that the stem and leaf can give us the actual values in the dataset, then the circle corresponds to 71 and 72. We can then note that there are 2 children who solved the Rubik's cube at 71 and 72 seconds. CONCEPT Stem-and-Leaf Plots 3 The first quartile (Q1) value from the above box plot is __________. 54 65 40 47 RATIONALE Note the value for Q1 is the left edge of the box, which is 47. CONCEPT Five Number Summary and Boxplots 4 The formula for the standard deviation of a sample is: [Show More]

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