April 2024
Intermediate to advanced
824 pages
36h 45m
English
Content preview from Business Statistics
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Chapter 3 | Measures of Central Tendency 111
So, median M
d
is
243.1 248.2
245.65
2
+
=
First and third quartile can be computed as follows:
Q
1
is the size of
n 1
th
4
+
item = size of
36 1
th
4
+
item = 9.25th value
Q
1
= 9th value + 0.25(10th value – 9th value) = 207.1 + 0.25(207.7 – 207.1)
= 207.25
Q
3
is the size of
n 1
3 th
4
+
item = size of
36 1
3 th
4
+
item = 27.75th value
Q
3
= 27th value + 0.75(28th value – 27th value) = 283.8 + 0.75(290.1 – 283.8)
= 288.52
Hence, rst quartile Q
1
= 207.25 and third quartile Q
3
= 288.52
FIGURE 3.31
Minitab output for Example
3.26
FIGURE 3.32
SPSS output for Example 3.26
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