OCR MEI - S1 - 20th May 2015

Original post by danwilkins

I did that too. You can leave it as a fraction or decimal can't you?

I think so. I've just seen in a past paper before mark down 1 if not put as rounded decimal but I think it's ok

Reply 81

Cadherin

14

Hm - never sure with stats. Section A was easy, section B was a little more challenging. Half my class got accept H1 for both and the other half got accept H0 then accept H1 - anyone know for sure? It looked as if it would be accept H1 for 1%, but anyone know for certain?

Reply 82

Connorbwfc

For the last question I just did 6/20 * 5/19 which gave me 3/38.

Quite sure this is correct because the third chocolate doesn't matter

Reply 83

What did everyone get for the second last one? I got 7/something

Reply 84

Original post by JamesExtra

I did that. You don't get marked down if you leave your answer as a fraction do you?

I don't think so

Reply 85

Original post by JamesExtra

What did everyone get for the second last one? I got 7/something

What question was that?

Reply 86

Original post by alicec11

What question was that?

I can't remember what the question was. It was the one before the very last question

Reply 87

Original post by Cadherin

Hm - never sure with stats. Section A was easy, section B was a little more challenging. Half my class got accept H1 for both and the other half got accept H0 then accept H1 - anyone know for sure? It looked as if it would be accept H1 for 1%, but anyone know for certain?

I got Reject H1 because it was outside the significance level ?

Reply 88

liverpool2044

10

Original post by Connorbwfc

For the last question I just did 6/20 * 5/19 which gave me 3/38.

Quite sure this is correct because the third chocolate doesn't matter

last question was more than 2 to get a cherry wasnt it?

i did 6/20 to get it first time + 14/20*6/19 and added them together then took it off

Reply 89

Fle

Original post by alicec11

I got Reject H1 because it was outside the significance level ?

Same that would mean changing it to 5% would have no effect wouldn't it?

Reply 90

Bellbird

Original post by danwilkins

I did that too. You can leave it as a fraction or decimal can't you?

your answer would be getting other chocolate exactly after 2 cherries?

because it asked at least 2 cherries before other chocolates that he likes..
Let cherries be C and others be B
the possibilities of not getting at least 2 cherries be4 other chocolate would be
CB
BC
BB
i did 1- P(CB+BC+BB)
I am probably wrong ..

Reply 91

liverpool2044

10

hypothesis test, null is kept in first test. Null rejected in second due to being lower than sig level

Reply 92

otherdan

10

Original post by Connorbwfc

For the last question I just did 6/20 * 5/19 which gave me 3/38.

Quite sure this is correct because the third chocolate doesn't matter

I think so too, as it said 'more than 2 attempts' to get one he liked (a non-cherry).

Reply 93

Bellbird

Original post by JamesExtra

I can't remember what the question was. It was the one before the very last question

I did P(getting 3 oranges)x P(getting 3 oranges)

Reply 94

benwood

1

Told you two tailed tests wouldn't come up

Reply 95

jirapat121

Original post by liverpool2044

hypothesis test, null is kept in first test. Null rejected in second due to being lower than sig level

yeah that's what i did as well thanks for reassuring

Reply 96

Original post by Bellbird

I did P(getting 3 oranges)x P(getting 3 oranges)

What answer did you get? Was it 7/something?

Reply 97

Winner2015

Anyway swear down the hypothesis ting never came up ? That was a tree diagram m8

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Reply 98