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OCR MEI Maths: Paper 2, 12th June 2019 Unofficial mark scheme

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Reply 80

tdag

Original post by beditness

Predictions on grade boundaries?
Was the first hypothesis test, 2-tailed or 1-tailed?

1 tail cuz it was looking for a decrease in mean

Reply 81

ullaelfadill

i dont think youre meant to use 83, there were 20 something jaguars and that was the value i used

Original post by tdag

think i worked out the probability of 10 or more panthers out of 83?? i think that was the number they gave. this value was more than 2.5%..

Reply 82

NaomiWilso

Original post by ullaelfadill

for the sector question, they gave you perimeter and area.

24.48 perimeter, I think it was 30 something for the area I can’t remember though

Reply 83

tdag

Original post by ullaelfadill

i dont think youre meant to use 83, there were 20 something jaguars and that was the value i used

didn't it say the camera recorded 83 jaguars tho in the regions they were looking at

Reply 84

ullaelfadill

thankss

Original post by NaomiWilso

24.48 perimeter, I think it was 30 something for the area I can’t remember though

Reply 85

ullaelfadill

Original post by tdag

didn't it say the camera recorded 83 jaguars tho in the regions they were looking at

ive no idea now tbh cant remember, i thought they were tricking us tbh

Reply 86

beditness

Original post by tdag

1 tail cuz it was looking for a decrease in mean

You sure?
Someone else on this thread just said it was 2-tailed and I'm confused. I'm sure it was 1-tailed as well.

Reply 87

tdag

Original post by ullaelfadill

ive no idea now tbh cant remember, i thought they were tricking us tbh

it was a bit confusing tbh because they want people to trip up. Idek if what i did was correct..

Reply 88

tdag

Original post by beditness

You sure?
Someone else on this thread just said it was 2-tailed and I'm confused. I'm sure it was 1-tailed as well.

The first hypothesis test with normal distribution was definetely 1 Tailed

Reply 89

ullaelfadill

Original post by tdag

it was a bit confusing tbh because they want people to trip up. Idek if what i did was correct..

lol same

Reply 90

ullaelfadill

its def one tailed

Original post by beditness

You sure?
Someone else on this thread just said it was 2-tailed and I'm confused. I'm sure it was 1-tailed as well.

Reply 91

beditness

grade boundaries predictions?
Last year, you needed around 76% in this paper for an A* and 68% for an A

Reply 92

will_s7

0.216?

Original post by Lol45678

WhT about the two marker after that?

Reply 93

Lol45678

Yeah same! What did u get for the number of weeks?

Original post by will_s7

0.216?

Reply 94

will_s7

Original post by Lol45678

Yeah same! What did u get for the number of weeks?

23 u?

Reply 95

ullaelfadill

i messed up on the radius question because i got a negative and a positive answer

Reply 96

Deeznutsfuhn

That’s wrong btw :frown:

it wasn’t replaced

Original post by Lol45678

Yeah same! What did u get for the number of weeks?

Reply 97

Deeznutsfuhn

It was 83

Original post by ullaelfadill

ive no idea now tbh cant remember, i thought they were tricking us tbh

Reply 98

ullaelfadill

yeah

Original post by Deeznutsfuhn

That’s wrong btw :frown:

it wasn’t replaced

Reply 99

Lol45678

Ah safe same here

Original post by will_s7

23 u?

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OCR MEI Maths: Paper 2, 12th June 2019 Unofficial mark scheme

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