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Edexcel S1 A Level Maths

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Reply 620

Freddy-Francis

I am going to fail stats ! :redface:

Reply 621

OllieGCSEs

Another question, not maths related haha, but will we be penalised for drawing diagrams / charts in pen?

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Reply 622

nm786

Original post by OllieGCSEs

Another question, not maths related haha, but will we be penalised for drawing diagrams / charts in pen?

Posted from TSR Mobile

No of course not. But it's best to do it in pencil if you make a mistake you can easily rub it out.

(edited 10 years ago)

Reply 623

username963570

Original post by Nathan0012

3 significant figures, good luck for tomorrow, I hope you don't make any silly mistakes, it seems to be all I'm doing as well :redface:

ah ok

yeah you too , hahaha same i keep doing them ! the worst bit is if you make it early on your totally ****ed for the latter parts of the question !!

Reply 624

shyamshah

Original post by Prabin

If they say Q3 = x, then you know that probability of z being less than x is 0.75 because Q3 = 75%

If they tell you Q1 = x, probability of z being less than x is 0.25 as Q1 is 25% and then you read z values off the tables :smile:

Ahh okay thank you :wink:

Good luck for tomorrow!

Reply 625

Geassuser

I need help ! :'S

basically, you know when they are asking to find the width and length for any specific bar in the histogram, is there any formula that? Please help :frown:

Reply 626

That_Clever_Guy

Original post by Geassuser

I need help ! :'S

basically, you know when they are asking to find the width and length for any specific bar in the histogram, is there any formula that? Please help :frown:

You have to use ratios :smile:

common sense really

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Reply 627

Nathan0012

Original post by Geassuser

I need help ! :'S

basically, you know when they are asking to find the width and length for any specific bar in the histogram, is there any formula that? Please help :frown:

width1/width2 = class width1/class width2

height1/height2 = frequency density1/frequency density2

Reply 628

Geassuser

Original post by That_Clever_Guy

You have to use ratios :smile:

common sense really

Posted from TSR Mobile

Can you help me answer this question please? :biggrin:

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Reply 629

username963570

Original post by Geassuser

I need help ! :'S

basically, you know when they are asking to find the width and length for any specific bar in the histogram, is there any formula that? Please help :frown:

width is basically a ratio/proportion of class width. So if the class width for a given group was 10 and the width was 5 , and it asks you to find width for a group with class width of 5 - then the width would be 2.5 ( because 5( new class width) is a half of 10 ( original class width) so the width of the new group must be half of 5 - the original width )

Reply 630

Geassuser

Original post by Nathan0012

width1/width2 = class width1/class width2

height1/height2 = frequency density1/frequency density2

I applied the width formula for this question, and Got the width as 3. But the mark scheme says 4. Did I apply it wrong? Really confused

OH I GOT IT. Made a silly mistake -_- Thank you so much. Those formulas are amazing =D !

(edited 10 years ago)

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Reply 631

salini1995

Hey guys what does interpolation means

Reply 632

rachaelGodchild

we use interpolation to find quartiles from a group frequency distribution table

Reply 633

F1's Finest

Looks like some of you are gonna be doing an all nighter. It's a morning exam so maybe it is possible :/

You guys need some sleep though :tongue:

Best of luck guys, make TSR proud.

Reply 634

Xx4L3x

Soloman F S1 Question 3c please anyone?

http://http://www.tomred.org/uploads/7/7/8/3/778329/s1_qp_solomon_f.pdf

Reply 635

justinawe

Original post by James A

Looks like some of you are gonna be doing an all nighter. It's a morning exam so maybe it is possible :/

You guys need some sleep though :tongue:

Best of luck guys, make TSR proud.

That really isn't advisable though, please don't pull an all-nighter, guys! Wake up early to revise if you have to, but you do need some sleep! This isn't a science exam, where pulling an all-nighter to cram can be effective. For maths, it's imperative that your brains are functioning as well as possible!