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index of the first quartile

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Kevin Horn is the national sales manager for National Textbooks, Inc. He has a sale staff of 40 who visit college professors all the over the United States. Each Saturday morning he requires his sales staff to send him a report. This report includes, among other things, the number of professors visited the previous week. Listed below, ordered from smallest to largest, are the number of visits last week:

38 40 41 45 48 48 50 50 51 51 52
52 53 54 55 55 55 56 56 57 59 59 59 62 62 62 63 64 65 66 66 67 67
69 69 71 77 78 79 79

Determine the Q1 and Q3.

A. Q1 = 50.5 ; Q3 = 78
B. Q1 = 40 ; Q3 = 56
C. Q1 = 44; Q3 = 77
D. Q1 = 51 ; Q3 = 66

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Tips are included for finding the index of the first quartile.

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Hi. I assume that A - D above are choices, and this is a multiple choice question. Anyways, when figuring out quartiles, there are a few ways to do it. The easiest way, I have described below:

The first thing you do is you sort the list in order, which you ...

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