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05 May 2009, 06:19
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100% (01:00) correct
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Attachment:
Stat qts.doc
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
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05 May 2009, 07:22
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tenaman10
For odd number of list values.. median .. middle number.
For even number of list of values median is average two middle numbers.
in this problem. 73 values.. median value 37 the value when you arrange in ascending order.
Answer is clearly C.
Still confused.
See below e.g.
Find the median for the following list of values:
13, 18, 13, 14, 13, 16, 14, 21, 13
The median is the middle value, so I'll have to rewrite the list in order:
13, 13, 13, 13, 14, 14, 16, 18, 21
There are nine numbers in the list, so the middle one will be the (9 + 1) ÷ 2 = 10 ÷ 2 = 5th number:
13, 13, 13, 13, 14, 14, 16, 18, 21
05 May 2009, 07:24
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72/2 +1 = 37th score represents median.
Now, let's find to which interval 37th score belongs:
50-59 : 2 : the total number of the scores: 2
60-69 : 10 : the total number of the scores: 12 = 2 + 10
70-79 : 16 : the total number of the scores: 28 = 12 + 16
80-89 : 27 : the total number of the scores: 55 = 28 + 27 - So, 37th score (our median) belongs to 80-89 interval.
Now, let's find to which interval 37th score belongs:
50-59 : 2 : the total number of the scores: 2
60-69 : 10 : the total number of the scores: 12 = 2 + 10
70-79 : 16 : the total number of the scores: 28 = 12 + 16
80-89 : 27 : the total number of the scores: 55 = 28 + 27 - So, 37th score (our median) belongs to 80-89 interval.
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Problem Solving (PS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
