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Where did I go wrong on this math problem? (question, my answer and correct answer given)

 
 
Reply Tue 9 Oct, 2012 11:47 pm
This is the question & correct answer:

http://i.imgur.com/DXLwI.jpg

This is my answer and how I came to it:

http://i.imgur.com/dABtu.jpg

Where did I go wrong?

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Type: Question • Score: 0 • Views: 4,350 • Replies: 5
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markr
 
  1  
Reply Wed 10 Oct, 2012 12:07 am
@Anonymous1234567890,
After looking at this presentation:
http://www.wisc-online.com/objects/ViewObject.aspx?ID=QLT1102
I'd say there isn't a single correct answer.
Anonymous1234567890
 
  1  
Reply Wed 10 Oct, 2012 12:36 am
@markr,
Ah! I see. I calculated the width wrong.
Anonymous1234567890
 
  1  
Reply Wed 10 Oct, 2012 01:13 am
@Anonymous1234567890,
*sigh* something's still wrong.

max-min=
74-67=1.4

class width=1.4

But the professors class width =1.5

Why? If you were to round it to the nearest integer, wouldn't it be 1, if anything? Why round up? I'd understand if it was 1.48, but it's simply 1.4
markr
 
  1  
Reply Wed 10 Oct, 2012 01:21 am
@Anonymous1234567890,
You got me. Some of the decisions in the the tutorial were arbitrary. Like I said, I don't think there is a single correct answer.
Anonymous1234567890
 
  1  
Reply Wed 10 Oct, 2012 01:23 am
@markr,
Okay. Well, thank you for your help! I really appreciate it! You helped a lot! Smile
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