The Thomas Supply Company Inc. is a distributor of gas-powered generators. As wi
ID: 2630335 • Letter: T
Question
The Thomas Supply Company Inc. is a distributor of gas-powered generators. As with any business, the length of time customers take to pay their invoices is important. Listed below, arranged from smallest to largest, is the time, in days, for a sample of The Thomas Supply Company Inc. invoices.
10
10
12
19
28
30
34
38
40
40
41
43
45
46
49
52
54
56
57
60
62
64
67
70
73
76
77
79
85
93
Determine the first and third quartiles.
Q3
Determine the second decile and the fourth decile.
fourth decile
10
10
12
19
28
30
34
38
40
40
41
43
45
46
49
52
54
56
57
60
62
64
67
70
73
76
77
79
85
93
Explanation / Answer
There are 30 data elements.
-----
(a) Determine the first and third quartiles.
Q1 = ?
25%*30 = 7.5
Locator = 8
Q1 is the 8th element = 38
-------
Q3 = ?
75%*30 = 22.5
Locator = 23
Q3 is the 23rd data element = 67
(b) Determine the second decile and the eighth decile.
D2 = ?
20%*30 = 6
Locator = 6
D2 is the 6th data element = 30
-------
D4 = ?
80%*30 = 24
Locator = 24
D4 is the 24th data element = 70
-------
(c) Determine the 72nd percentile = ?
72%*30 = 21.6
locator = 22
72%ile is the 22nd data element = 64
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