Finite Math Examples

Find the Upper or Third Quartile
2 , 4 , 6 , 8 , 10 , 12 , 14 , 16
Step 1
There are 8 observations, so the median is the mean of the two middle numbers of the arranged set of data. Splitting the observations either side of the median gives two groups of observations. The median of the lower half of data is the lower or first quartile. The median of the upper half of data is the upper or third quartile.
The median of the lower half of data is the lower or first quartile
The median of the upper half of data is the upper or third quartile
Step 2
Arrange the terms in ascending order.
2,4,6,8,10,12,14,16
Step 3
Find the median of 2,4,6,8,10,12,14,16.
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Step 3.1
The median is the middle term in the arranged data set. In the case of an even number of terms, the median is the average of the two middle terms.
8+102
Step 3.2
Remove parentheses.
8+102
Step 3.3
Cancel the common factor of 8+10 and 2.
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Step 3.3.1
Factor 2 out of 8.
24+102
Step 3.3.2
Factor 2 out of 10.
24+252
Step 3.3.3
Factor 2 out of 24+25.
2(4+5)2
Step 3.3.4
Cancel the common factors.
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Step 3.3.4.1
Factor 2 out of 2.
2(4+5)2(1)
Step 3.3.4.2
Cancel the common factor.
2(4+5)21
Step 3.3.4.3
Rewrite the expression.
4+51
Step 3.3.4.4
Divide 4+5 by 1.
4+5
4+5
4+5
Step 3.4
Add 4 and 5.
9
Step 3.5
Convert the median 9 to decimal.
9
9
Step 4
The upper half of data is the set above the median.
10,12,14,16
Step 5
The median for the upper half of data 10,12,14,16 is the upper or third quartile. In this case, the third quartile is 13.
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Step 5.1
The median is the middle term in the arranged data set. In the case of an even number of terms, the median is the average of the two middle terms.
12+142
Step 5.2
Remove parentheses.
12+142
Step 5.3
Cancel the common factor of 12+14 and 2.
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Step 5.3.1
Factor 2 out of 12.
26+142
Step 5.3.2
Factor 2 out of 14.
26+272
Step 5.3.3
Factor 2 out of 26+27.
2(6+7)2
Step 5.3.4
Cancel the common factors.
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Step 5.3.4.1
Factor 2 out of 2.
2(6+7)2(1)
Step 5.3.4.2
Cancel the common factor.
2(6+7)21
Step 5.3.4.3
Rewrite the expression.
6+71
Step 5.3.4.4
Divide 6+7 by 1.
6+7
6+7
6+7
Step 5.4
Add 6 and 7.
13
Step 5.5
Convert the median 13 to decimal.
13
13
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 [x2  12  π  xdx ] 
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