S1, post your doubts here....

[saraA95]

Got k as 1\5, couldnt be able to continue rest of the question though ..

ughh i did k wrong and i knew how to do the rest

 

[saraA95]

ughh i did k wrong and i knew how to do the rest

do

what was the value of k?

if we get k wrong the rest of the queestions are wrong?

 

[ahmed soliman]

what are changes to values if classes were changed ?
i wrte mean decreases sd decreases median decreases

 

[Liam hadfield]

do
if we get k wrong the rest of the queestions are wrong?

you'll probably get a few method marks.

 

[Liam hadfield]

what are changes to values if classes were changed ?
i wrte mean decreases sd decreases median decreases

sd is unaffected since it's not affected by addition or subtraction.

 

[saraA95]

sd is unaffected since it's not affected by addition or subtraction.

how did you do ?? thanks btw

 

[Alla' Abu-Sultaneh]

in the first questions i forgot to make it to 3 significant figures, does anyone know how many marks i'll lose?

 

[saraA95]

in the first questions i forgot to make it to 3 significant figures, does anyone know how many marks i'll lose?

1 mark i think

 

[Alla' Abu-Sultaneh]

1 mark i think

i really hope it's only one mark! i really need a high A and the paper was really hard! i hope you get a high A! thank you!

 

[MarvinM]

i got that!!!

I think it actually was -0.015

 

[MarvinM]

what are changes to values if classes were changed ?
i wrte mean decreases sd decreases median decreases

The mean didn't decrease

 

[MarvinM]

When will there be an unofficial mark scheme?

 

[Irfan1995]

The mean, median, quartiles, and the interquarile range will ALL decrease by 5 minutes
The standard deviation will stay the same
I'm pretty sure about my answer.

And yes, k = 1/5 = 0.2; remember that they gave you the cumulative frequency table, not a normal p.d.f

 

[Liam hadfield]

in the first questions i forgot to make it to 3 significant figures, does anyone know how many marks i'll lose?

i'm not too sure, since you essentially affected all parts of the question. Your pmcc will come out different as will your regression line.

 

[jtbteddy]

How did you guys do on the exam overall?

 

[oikoik]

I'm so mad at myself because I didn't put the right max and min values on the box plot, which was like the easiest thing on the paper. ARRRRGGGHHH. And I'm not sure if I got the mean and standard deviation correct for that question where you had to alter the boundaries....

Is there going to be an unofficial mark scheme out soon?

 

[jtbteddy]

okaay dont forgeet: http://www.thestudentroom.co.uk/showthread.php?t=2355116

I'm so mad at myself because I didn't put the right max and min values on the box plot, which was like the easiest thing on the paper. ARRRRGGGHHH. And I'm not sure if I got the mean and standard deviation correct for that question where you had to alter the boundaries....

Is there going to be an unofficial mark scheme out soon?

 

[jackoo123]

https://www.xtremepapers.com/community/threads/s1-june-2013-solutions.26508/#post-555669