2017AP Statistics Summer Packet.pdf

Gaps clusters parts of the distribution that contain

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Gaps & Clusters: Parts of the distribution that contain an unusually small or large amount of data.
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22 Comparison of Shapes of Different Graphs
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23 Example: You are interested in studying how much time students spend using the Web each day. You study 30 students, and their times spent on the Web (in minutes) for a particular day are listed below. 7 20 24 25 25 28 28 30 32 35 42 43 44 45 46 47 48 48 50 51 72 75 77 78 79 83 87 88 135 151 a) Make a stemplot of times spent of the Web. Amount of Time Students Spend on the Internet (per day) 0 7 1 2 0 4 5 5 8 8 3 0 2 5 4 2 3 4 5 6 7 8 8 5 0 1 6 7 2 5 7 8 9 8 3 7 8 9 10 11 12 13 5 14 15 1 KEY 0 7 = 7 minutes on the internet b) Describe the distribution. The distribution of time students spend on the internet per day is skewed right. The median time spent on the internet is 46.5 minutes and the inter-quartile range is 47 minutes. There is an outlier at 151 minutes. Note: The median and IQR were used to describe center and spread because the data is skewed. If the data were symmetric, the mean and standard deviation would have been given instead. Now, complete Worksheet F (Describing Quantitative Data); page 34
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