Edexcel AS Maths Statistics and Mechanics 22/05/2019 Unofficial MarkScheme

Watch
Poll: What mark do you think you got for this paper? (out of 60)
50-60 (35)
19.23%
40-50 (34)
18.68%
30-40 (46)
25.27%
20-30 (33)
18.13%
10-20 (16)
8.79%
Under 10 (18)
9.89%
helloman1
Badges: 12
Rep:
?
#1
Report Thread starter 2 years ago
#1
Does anyone have the unofficial mark scheme for the Edexcel AS Maths Statistics and Mechanics Paper 2 22/05/2019?
Thanks
9
reply
Yeeted808
Badges: 4
Rep:
?
#2
Report 2 years ago
#2
No I just know that I f’d up
0
reply
biostudie
Badges: 5
Rep:
?
#3
Report 2 years ago
#3
For the Venn Diagrams, I got
X=0
and Y and Z as 0.02 and 0.13 (I forgot which way around, sorry about that )

For distribution I wasn't sure whether to put binomial or uniform.

Stats hypothesis one-tailed test I got X>= 9, and the two mistakes as H1 should be > not >= and that they tried to find P(X=8) not P(X>=8).

Time taken for the pulley I got 1.0 something - possibly 1.02-1.04.

I'm not 100% confident but would like to see what others got!
Cheers
1
reply
mani93786
Badges: 11
Rep:
?
#4
Report 2 years ago
#4
For mechanics question 2, after Q hits the ground what acceleration does P move at?
0
reply
helloman1
Badges: 12
Rep:
?
#5
Report Thread starter 2 years ago
#5
Yes I said the two mistakes were the wrong signs for H1 (should be >).
I also said that she didn't find the critical reigon in order to calculate whether H0 should be discounted.
(Original post by biostudie)
For the Venn Diagrams, I got
X=0
and Y and Z as 0.02 and 0.13 (I forgot which way around, sorry about that )

For distribution I wasn't sure whether to put binomial or uniform.

Stats hypothesis one-tailed test I got X>= 9, and the two mistakes as H1 should be > not >= and that they tried to find P(X=8) not P(X>=8).

Time taken for the pulley I got 1.0 something - possibly 1.02-1.04.

I'm not 100% confident but would like to see what others got!
Cheers
0
reply
cmuld
Badges: 4
Rep:
?
#6
Report 2 years ago
#6
It doesn't accelerate so you have to work out its final speed after its been accelerated by Q, then use the velocity and remaining distance to calculate that time, adding it to the time whilst its accelerating.
(Original post by mani93786)
For mechanics question 2, after Q hits the ground what acceleration does P move at?
1
reply
haxhacks
Badges: 15
Rep:
?
#7
Report 2 years ago
#7
For part two of the pulley question,

The answer was 1.04 seconds , acceleration wasnt constant, so you had to take a=4.2 for only 0.4 m (because the particle that causes the acceleration does it because it pulls particle P downwards for 0.4m where the string is now untaut)

Just to confirm, who else got my value?
0
reply
arothman101
Badges: 6
Rep:
?
#8
Report 2 years ago
#8
Yeah, i got the same. You also had to find the speed of the particle after 0.4m to use that speed as the initial speed for the remaining 1.1
(Original post by haxhacks)
For part two of the pulley question,

The answer was 1.04 seconds , acceleration wasnt constant, so you had to take a=4.2 for only 0.4 m (because the particle that causes the acceleration does it because it pulls particle P downwards for 0.4m where the string is now untaut)

Just to confirm, who else got my value?
2
reply
Ryan0887
Badges: 13
Rep:
?
#9
Report 2 years ago
#9
For venn diagram I got y = 0.054 and z= 0.096
(Original post by biostudie)
For the Venn Diagrams, I got
X=0
and Y and Z as 0.02 and 0.13 (I forgot which way around, sorry about that )

For distribution I wasn't sure whether to put binomial or uniform.

Stats hypothesis one-tailed test I got X>= 9, and the two mistakes as H1 should be > not >= and that they tried to find P(X=8) not P(X>=8).

Time taken for the pulley I got 1.0 something - possibly 1.02-1.04.

I'm not 100% confident but would like to see what others got!
Cheers
0
reply
Dan7547556
Badges: 3
Rep:
?
#10
Report 2 years ago
#10
****ing ******** paper why was it way harder than the 2018 one
2
reply
zambob
Badges: 3
Rep:
?
#11
Report 2 years ago
#11
(Original post by arothman101)
Yeah, i got the same. You also had to find the speed of the particle after 0.4m to use that speed as the initial speed for the remaining 1.1
Yhea I like this as well 👌
0
reply
zambob
Badges: 3
Rep:
?
#12
Report 2 years ago
#12
The one with v=12+4t-t^2 the acceleration was at t=6 and the gradient of the graph is acceleration so differentiate and get - 11 ms^2
0
reply
Elliamy
Badges: 8
Rep:
?
#13
Report 2 years ago
#13
I also got -11ms. For the distance S, I integrated the equation for V between limits 3 and 0 and got 45M, what about you?
2
reply
Supm8
Badges: 8
Rep:
?
#14
Report 2 years ago
#14
I got 45m !
2
reply
ItsEuan
Badges: 7
Rep:
?
#15
Report 2 years ago
#15
the question specified first 2 mistakes which implies there were more
i spotted 3, the 2 u said and that fact that they didnt let X be a RANDOM VARIABLE
it has to be one to be able to binomial distribute something
it came before the the P(X=8) mistake
(Original post by biostudie)
For the Venn Diagrams, I got
X=0
and Y and Z as 0.02 and 0.13 (I forgot which way around, sorry about that )

For distribution I wasn't sure whether to put binomial or uniform.

Stats hypothesis one-tailed test I got X>= 9, and the two mistakes as H1 should be > not >= and that they tried to find P(X=8) not P(X>=8).

Time taken for the pulley I got 1.0 something - possibly 1.02-1.04.

I'm not 100% confident but would like to see what others got!
Cheers
0
reply
Supm8
Badges: 8
Rep:
?
#16
Report 2 years ago
#16
(Original post by zambob)
The one with v=12+4t-t^2 the acceleration was at t=6 and the gradient of the graph is acceleration so differentiate and get - 11 ms^2
I got -8 ? Coz -2(6)+4 = -8 ? . Is that wrong ?
0
reply
haxhacks
Badges: 15
Rep:
?
#17
Report 2 years ago
#17
Yes, -8 is the correct answer

But you had to write the magnitude of it, therefore 8 ms^-2
(Original post by Supm8)
I got -8 ? Coz -2(6)+4 = -8 ? . Is that wrong ?
Last edited by haxhacks; 2 years ago
0
reply
Supm8
Badges: 8
Rep:
?
#18
Report 2 years ago
#18
How many marks was the tot pulley q?
0
reply
haxhacks
Badges: 15
Rep:
?
#19
Report 2 years ago
#19
11
(Original post by Supm8)
How many marks was the tot pulley q?
0
reply
haxhacks
Badges: 15
Rep:
?
#20
Report 2 years ago
#20
some kind of stratified sampling
(Original post by Wanderingpro)
did anything come up on chapter 1 of stats like the census stuff
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

Feeling behind at school/college? What is the best thing your teachers could to help you catch up?

Extra compulsory independent learning activities (eg, homework tasks) (23)
8.49%
Run extra compulsory lessons or workshops (38)
14.02%
Focus on making the normal lesson time with them as high quality as possible (46)
16.97%
Focus on making the normal learning resources as high quality/accessible as possible (38)
14.02%
Provide extra optional activities, lessons and/or workshops (79)
29.15%
Assess students, decide who needs extra support and focus on these students (47)
17.34%

Watched Threads

View All
Latest
My Feed