!! OL Maths 2015 predictions, discussion etc

Tet2015

leavingcert15 wrote: »

Is the interquartile range the difference between the 3rd and 1st quarter?

The interquartile range is the upper quartile (3/4 of way into data) - lower quartile (1/4 of way into data)

EXTRAS:

• Standard deviation displays how much variatin there is from mean
• Range is the largest value minus the lowest value (crude method as it only uses high and low value)
• Percentile is data divided into 100 equal parts

Outliers: Value that is either very high or low, hence not typical of values in data set. This has a singificant effect on the mean. E.g. 1, 2, 2, 3, 69, 2 4, 5


THE 3 AVERAGE SHEEP:

Mode: Most common value in a set of data


Mean: Most frequently used, 'average'


Median: Put numbers in order of size from smallest to largest, the median is middle number.

Tet2015

skippy1977 wrote: »

Yeah you could do long division for it

I thought it was asking to be multiplied because of the 'x' sign ?!

Anonymagician

Tet2015 wrote: »

I thought it was asking to be multiplied because of the 'x' sign ?!

Yeah but we didn't know what g(x) was so you brought it over to the other side so g(x) = long division

skippy1977

Tet2015 wrote: »

I thought it was asking to be multiplied because of the 'x' sign ?!

Yeah but the question was to find g(x).
(2-3x) x g(x) gives 15x^2-22x+8

so g(x) could be found by dividing 15x^2-22x+8 by 2-3x

Tet2015

Anonymagician wrote: »

Yeah but we didn't know what g(x) was so you brought it over to the other side so g(x) = long division

I read it as : g(x) = 15x^2-22x+8, I thought it was actually one segment and that we just had to multiply to get x. I totally messed up that paper for sure.

Scirpt

Any chance someone could send me on pictures of the DEB mock paper 2? I can return the favor with the examcraft mock if desired. Would be a huge help!

theLuggage

spl99 wrote: »

Firstly, the the guy who posted the project maths link to using the calculator to answer standard deviation etc. Why the fudge do we not get shown that in school?! :O

Um you should be - I've shown all my students anyway, those that were listening

Oh and the guy is a gal!

Scirpt

https://www.examinations.ie/schools/Mathematics_Strand_1_Sample_Questions_Higher_and_Ordinary_Level.pdf
Anyone have solutions to these for OL?

randylonghorn

theLuggage wrote: »

Oh and the guy is a gal!

Welcome to the 'net, theLuggage, everyone is male until proven otherwise!

If you see spurious or rainbowtrout around, wave at them, they have the same problem (esp. RBT, as she teaches AgSci!)

theLuggage

Lol! I was tempted to create a male alter ego but it wouldn't have matched some of my other posts!

jgirl18

Ok how easy is it to fail maths paper 2. I actually despise probability. My mind does not function in that way. I don't care about it and never will.

raynbow

Since this is my first post, I can't directly link but for anyone looking for constructions last-minute, this website is super helpful!

projectmathshelp(.)ie/wp-content/uploads/2012/12/project_maths_help_constructions.pdf

Best of luck guys, by my reasoning the Dept. were well aware of what they were doing when they made these papers...If HL don't get a s.o.b of a paper (not that I'm wishing it for my past comrades!), and we don't get a beour of a paper tomorrow I'll be fairly surprised

Cheerios

randylonghorn wrote: »

Welcome to the 'net, theLuggage, everyone is male until proven otherwise!

If you see spurious or rainbowtrout around, wave at them, they have the same problem (esp. RBT, as she teaches AgSci!)

Whaa? Spurious is a... girl?

Kermin

After paper 1 i'm really stressing for this can't figure the most basic of questions.... A B3 hopeful has turned into a 'if i pass'

Anonymagician

Cheerios wrote: »

Whaa? Spurious is a... girl?

If I had a euro for the amount of times we had to go over this

IrishLoriii

Im actually going to cry I feel so stressed..my friend informed me tonight that im screwed for p2
confirming all my fears..never have i prayed so much just to pass a paper that i am in pass for!!

randylonghorn

Nice friend!! :rolleyes:

Get some sleep, go in tomorrow, try to stay as calm as possible and attempt everything you can. The examiners will be looking for any excuse to give you marks, not to take them away.

Kermin

Any advice for trigonometry I've forgotten it all.

Tet2015

Kermin wrote: »

Any advice for trigonometry I've forgotten it all.

Page 16 of your log tables has it all.

Kermin

Its the application of the formula is a problem

Peregrine

Post exam discussion thread: http://www.boards.ie/vbulletin/showthread.php?t=2057443321