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

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Does anyone have the unofficial mark scheme for the Edexcel AS Maths Statistics and Mechanics Paper 2 22/05/2019?

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#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

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

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#4

For mechanics question 2, after Q hits the ground what acceleration does P move at?

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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.

I also said that she didn't find the critical reigon in order to calculate whether H0 should be discounted.

(Original post by

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

**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

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#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

For mechanics question 2, after Q hits the ground what acceleration does P move at?

**mani93786**)For mechanics question 2, after Q hits the ground what acceleration does P move at?

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#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?

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?

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#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

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?

**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?

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#9

For venn diagram I got y = 0.054 and z= 0.096

(Original post by

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

**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

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#11

(Original post by

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

**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

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#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

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#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?

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#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

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

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

**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

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#16

(Original post by

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

**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

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#17

Yes, -8 is the correct answer

But you had to write the magnitude of it, therefore 8 ms^-2

But you had to write the magnitude of it, therefore 8 ms^-2

(Original post by

I got -8 ? Coz -2(6)+4 = -8 ? . Is that wrong ?

**Supm8**)I got -8 ? Coz -2(6)+4 = -8 ? . Is that wrong ?

Last edited by haxhacks; 1 year ago

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#20

some kind of stratified sampling

(Original post by

did anything come up on chapter 1 of stats like the census stuff

**Wanderingpro**)did anything come up on chapter 1 of stats like the census stuff

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