501 Questions To Master GED Test Mathematics_pag361

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501 Questions to Master the GED® Mathematical Reasoning Test
 457. The correct answer is $300,000. In order to find the median of a 
set of data, they must first be put in increasing order and the middle 
piece of data will be the median. 
 $200,000, $280,000, $280,000, $320,000, $390,000, $424,000
 In this case, there are two house prices that make up the middle 
of the data, so we must take the average of those: 280,000 + 320,000________________
2 
= 300,000. So the median house price in this neighborhood is 
$300,000
 458. The correct answer is choice b. To find the median number 
of pencils, we first need to find out the total number of students 
who were in class that day. Add the frequency for each bar: 12 + 
10 + 8 + 4 + 6 = 40 students. The median will be the piece of data 
that is right in the middle when the individual entries are put in 
increasing order. Since this is an even number of data entries, the 
middle piece will be the average of the 20th and 21st piece of data. 
Use the bars to count the data points: Since there are 12 students 
who brought 0 pencils and 10 students who brought 1 pencil, we 
know that the 20th and 21st pieces of data are both going to be in 
the column of students who brought 1 pencil, so the median is 1 
(choice b).
 Choice a is incorrect because you chose the mode, which is the 
most frequent piece of data, but the median is the middle piece of 
data, once the data has been organized from least to greatest.
 Choice c is incorrect because although 2 is in the middle of the bar 
graph’s horizontal axes, there are 40 different pieces of data dis-
played in the bar graph, and the median will be the average of the 
20th and 21st pieces of data, which are in the column for 1 pencil. 
(There are 12 pieces of data in the first column for 0 pencils, and 
then there are 10 pieces of data in the second column for 1 pencil, 
so the 20th and 21st pieces of data are there.)
 Choice d is incorrect because you chose the maximum number of 
pencils students had, but not the median.
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