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Data About Us: Statistics: Teacher's Guide: Connected

Information approximately Us engages scholars in investigations approximately themselves. The unit introduces key ideas and procedures in data and information research. facts approximately Us was once designed to aid scholars have interaction within the means of facts research, signify facts, facts descriptions and knowledge techniques

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Explain. f. Suppose four more people move to Slugville. Each has a weekly income of $200. How would the mean, median, and mode change? Investigation 3 What Do We Mean by Mean? qxd 8/16/05 10:08 AM Page 60 18. A recent survey asked 25 middle-school students how many movies they watch in one month. The data are shown below. Notice that the data vary from 1 movie to 30 movies. Movies Watched Student Number Wes 2 Tomi 15 Ling 13 Su Chin 1 Michael 9 Mara 30 Alan 20 Jo Tanisha 1 25 Susan 4 Gil 3 Enrique 2 Lonnie 3 Ken 10 Kristina 15 Mario 12 Henry 5 Julian 2 Alana 4 Tyrone 1 Rebecca 4 Anton 11 Jun 8 Raymond 8 Angelica 17 a.

Explain how to find the median. What does the median tell you? b. Do any of the 16 households have the median number of children? Explain. 2. a. What is the mean number of children per household for the 16 households? Explain how to find the mean. What does the mean tell you? b. Do any of the 16 households have the mean number of children? Explain. For Exercises 3 and 4, the mean number of people per household for eight students is 6 people. 3. Multiple Choice What is the total number of people in the eight households?

8. a. On a piece of grid paper, make a coordinate graph. Show age (in months) on the horizontal axis and height (in centimeters) on the vertical axis. To help you choose a scale for each axis, look at the least and greatest values for each measure. b. Explain how you can use your graph to find out whether the youngest student is also the shortest student. qxd 5/16/05 11:15 AM Page 41 c. Use your graph to describe what happens to students’ heights as the students get older. d. What would happen to the graph if you extended it to include people in their late teens or early twenties?

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