Reading Skills. Each year the director of the reading program in a school district administers a standard test of reading skills. Then the director compares the average score for his district with the...


Reading Skills. Each year the director of the reading program in a school district administers a standard test of reading skills. Then the director compares the average score for his district with the national average. Figure 2.20 was presented to the school board in the year 2013.


FIGURE Average reading scores


a. Obtain a truncated version of Fig. by sliding a piece of paper over the bottom of the graph so that the bars start at 16.


b. Repeat part (a), but have the bars start at 18.


c. What misleading impression about the year 2013 scores is given by the truncated graphs obtained in parts (a) and (b)?


2008 2009 2010 2011 2012 2013<br>Year<br>I District average I National average<br>Average score<br>R82으실은86420<br>

Extracted text: 2008 2009 2010 2011 2012 2013 Year I District average I National average Average score R82으실은86420

Jun 02, 2022
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