Year 12s: what will be the first way you research your future options? >>

Quick S2 question

If we have

X ~ B(12, 0.25)

and asked to find

P(u-o < X < u+o)

(u = mu, o = sigma)

I got

P(1.5 < X < 4.5)

I'm confused as to how that would then be

P(1 \leq X \leq 4)

, if X is greater than 1.5 why can it also be greater than or equal to 1? Wouldn't it be greater than or equal to 2?
Thanks!

Reply 1

BabyMaths

Original post by IgorYakov

If we have

X ~ B(12, 0.25)

and asked to find

P(u-o < X < u+o)

(u = mu, o = sigma)

I got

P(1.5 < X < 4.5)

I'm confused as to how that would then be

P(1 \leq X \leq 4)

, if X is greater than 1.5 why can it also be greater than or equal to 1? Wouldn't it be greater than or equal to 2?
Thanks!

Yes

P(1.5<X<4.5)=P(2 \le X \le 4)

By the way for sigma and mu just put \sigma and \mu in your LaTeX.

Reply 2

fGDu

Original post by IgorYakov

If we have

X ~ B(12, 0.25)

and asked to find

P(u-o < X < u+o)

(u = mu, o = sigma)

I got

P(1.5 < X < 4.5)

I'm confused as to how that would then be

P(1 \leq X \leq 4)

, if X is greater than 1.5 why can it also be greater than or equal to 1? Wouldn't it be greater than or equal to 2?
Thanks!

I agree with you, I think it is

Unparseable latex formula:

P(1.5<X<4.5)=P(2 \le X \le 4)

Reply 3

IgorYakov

Original post by BabyMaths

Yes

P(1.5<X<4.5)=P(2 \le X \le 4)

By the way for sigma and mu just put \sigma and \mu in your LaTeX.

PRSOM

Thanks!

Original post by fGDu

I agree with you, I think it is

Unparseable latex formula:

P(1.5<X<4.5)=P(2 \le X \le 4)

Thanks!

Quick Reply

Latest

Articles for you

How to pick the right student accommodation

What kind of university is best for you?

How to revise for GCSE Languages exams: AQA explains what to do

Best video resources for revising GCSE or A-level English

Quick S2 question

Quick Reply

Related discussions

Latest

Trending

Trending

Articles for you