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# S1 Normal distribution Question Watch

1. I have attached the question and answer.

What i don't understand is why standard deviation is 10? when standard deviation is actually root of 10.

I get a completely different answer when using root 10. Is that fine?

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2. what was part (a)
3. (Original post by Putch1)
I have attached the question and answer.

What i don't understand is why standard deviation is 10? when standard deviation is actually root of 10.

I get a completely different answer when using root 10. Is that fine?

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Clear printing error, I guess.

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4. (Original post by TenOfThem)
what was part (a)
a) write down 3 properties of the normal distribution of X. :P

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5. (Original post by Putch1)
a) write down 3 properties of the normal distribution of X. :P

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is it a paper
6. (Original post by TenOfThem)
is it a paper
yes january 2004 edexcel

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7. (Original post by StUdEnTIGCSE)
Clear printing error, I guess.

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I thought so too but it is from the official edexcel 2004 mark scheme

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8. (Original post by Putch1)
yes january 2004 edexcel

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The paper says sigma=10

Where does your copy come from
9. (Original post by TenOfThem)
The paper says sigma=10

Where does your copy come from
O.o that's odd

http://www.tomred.org/s1.html

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10. (Original post by Putch1)
O.o that's odd

]
That site is usually good

The paper from edexcel is correct though
11. (Original post by TenOfThem)
That site is usually good

The paper from edexcel is correct though
yea >.< still strange though. Thanks for helping TenOfThem! I was getting sooo confused for a while there.

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