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DarkendSinz30 Group Title

Construct both an ungrouped and a grouped frequency distribution for the data given below: 124 115 111 112 118 123 121 116 114 113 118 110 110 112 116 118 120 115 120 110

  • 2 years ago
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  1. DarkendSinz30 Group Title
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    I know I have to organize them from least to greatest right?

    • 2 years ago
  2. sirm3d Group Title
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    yes. for the grouped frequency distribution, how many intervals are needed?

    • 2 years ago
  3. DarkendSinz30 Group Title
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    110,110,110,111,112,112,113,114,115,115,116,116,118,118,118,120,121,123,124

    • 2 years ago
  4. DarkendSinz30 Group Title
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    I am going to say 4?

    • 2 years ago
  5. sirm3d Group Title
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    |dw:1354405916219:dw|

    • 2 years ago
  6. sirm3d Group Title
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    is there any formula for this number of intervals?

    • 2 years ago
  7. DarkendSinz30 Group Title
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    I don't follow if there is I can't remember what the formula is?

    • 2 years ago
  8. sirm3d Group Title
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    the general rule is to use not too few and not too many intervals. so 4 is okay me.

    • 2 years ago
  9. sirm3d Group Title
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    just make sure that the low interval must include 110 and the high interval must include 124. also, equal intervals are preferred over unequal intervals, particularly to ratio type of data.

    • 2 years ago
  10. DarkendSinz30 Group Title
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    |dw:1354406677376:dw|

    • 2 years ago
  11. DarkendSinz30 Group Title
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    does that look right?

    • 2 years ago
  12. sirm3d Group Title
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    nope. the sizes are different. try 110-113, 114-117,118-121, 122-125

    • 2 years ago
  13. DarkendSinz30 Group Title
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    okay it will be the numbers though right?

    • 2 years ago
  14. DarkendSinz30 Group Title
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    X F ----------------- 110 - 113 7 114 - 117 5 118 - 121 5 122 - 125 2

    • 2 years ago
  15. DarkendSinz30 Group Title
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    That looks better

    • 2 years ago
  16. sirm3d Group Title
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    =)

    • 2 years ago
  17. sirm3d Group Title
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    there are 20 data points in your given, but you only have a total of 19 in your grouped frequency distribution.

    • 2 years ago
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