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September 13th, 2018, 11:26 AM   #1
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Joined: Nov 2010

Posts: 97
Thanks: 1

Frequency Distribution

Hello,

I completed a practice assignment, but I am not sure if I did this right or incorrectly. I haven't received the textbook yet, but it's on the way. Can you check to see if I am doing this correctly/incorrectly? If I made a mistake, can you please explain step-by-step in very simple terms so I can learn how to do these?

My biggest question is for # 3 Part A. Find the Apparent Limits.
I set it up as 60-66, but is that a good interval width/size? Because when I tried to come up with 10 intervals the last set of numbers looked weird to me. lol.
This is my first time taking statistics, so please forgive me.

If you see anything else that looks incorrect, please inform me. Thank you so much!

- Christina
Attached Images
 Practice1.jpg (86.1 KB, 3 views) Practice2.jpg (25.1 KB, 3 views) Practice3.jpg (51.1 KB, 3 views)

 September 13th, 2018, 01:35 PM #2 Global Moderator   Joined: May 2007 Posts: 6,770 Thanks: 700 You seemed to have made a basic error at the very beginning. The range is 60 and you wanted 10 intervals. However you made your interval widths = 7, not 6. The highest interval should be 61-66, etc.
 September 13th, 2018, 09:17 PM #3 Member     Joined: Nov 2010 Posts: 97 Thanks: 1 Oh okay! Thank you so much for pointing that out. I am very grateful for you! To make sure I am getting the hang of this: would the same also apply if I pick a 12 interval and a width size of 5? That would give me 62-66, is that correct? Also, for parts B-G did I start solving those correctly (hypothetically)? Lastly, are there any free SPSS software online that I can use? I have to print out my data, but I don't want to spend \$100 ....
 September 14th, 2018, 01:15 PM #4 Global Moderator   Joined: May 2007 Posts: 6,770 Thanks: 700 Intervals for 12 - you are correct. B-G solutions look OK - I did not check the actual counts. I have knowledge of SPSS software. Why not just print - I presume you can create the file you want in the format you need. Thanks from ChristinaScience

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