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# Intermediate 2 Maths : Mode, Median, Ranger, Quartiles, Semi Quartile Range Help? Watch

1. Can anyone help me find the Mode, Median, Range, Quartiles, and Semi Interquartile Range from this table? Its an assignment and I have no clue how to do it!

Thanks!
2. (Original post by thescottishboy96)
Its an assignment and I have no clue how to do it!
Why have you ben given an assignment that you have no understanding of

Perhaps look at BiteSize to get some basic understanding
3. Because for us to be able to sit the final exam we have to complete this assignment, however I have been off a few lessons when this has been gone over, and could really do with a hand!
4. Mode - is the number which appears the most
Median - This is the middle number in an ordered list of the data
Range - Highest take away the lowest number
Quartiles - Your Q1 which is the middle number of the lower part of the ordered list of data, Your Q2 which is your median, and Q3 which is the middle number of the higher part of the ordered list
Semi Interquartile Range - Q3 minus Q1 divided by 2

I'd rather you used that information to help yourself with it than someone giving you the answers, because you won't learn that way, unfortunately.

Example:

Data: 1,1,1,2,3,4,5,6,7,8,9,10,11,12

Mode - 1
Median - 5.5
Range - 11
Quartiles - Q1= 1.5, Q2= 5.5, Q3= 9.5
Semi Interquartile Range - 9.5-1.5/2 = 4
5. Thanks Shannon, however, I amen't all that sure how to apply it to the table? In this case, would the mode in my table be 9? or would it be 28-30 because 9 falls into the 28-30 age category? Or is this wrong? Thanks again!
6. (Original post by thescottishboy96)
Thanks Shannon, however, I amen't all that sure how to apply it to the table? In this case, would the mode in my table be 9? or would it be 28-30 because 9 falls into the 28-30 age category? Or is this wrong? Thanks again!

In your table I think, the mid value of 29 would be the mode, as it is the number that appears the most. Your frequency column highlights how many times that number appears. So, in this set of data 29 appears nine times. Just as 17 doesn't appear at all, 20 appears twice and so on.
7. If in doubt with that though, I would just write down the category of 28-30
8. (Original post by thescottishboy96)
Thanks Shannon, however, I amen't all that sure how to apply it to the table? In this case, would the mode in my table be 9? or would it be 28-30 because 9 falls into the 28-30 age category? Or is this wrong? Thanks again!

(Original post by Shannon~)
If in doubt with that though, I would just write down the category of 28-30
The modal group is 28-30

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Updated: April 11, 2013
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